







Pourcentage 
20080602 

ferdjoukh pose la question : un article passe de 12 euros à 10 euros.
quel est le pourcentage de réduction?
et quelle est l'opération à faire pour obtenir le résultat?
merci Antoine Letarte lui répond. 





Le pourcentage en +ou en que représent la diférence de 2 nombres 
20070429 

Jean pose la question : pouvez vous me donner la formule pour trouver
le pourcentage en +ou en
que représent la diférence de 2 nombres ex: 8594 et 7634 Claude Tardif lui répond. 





le prix de départ 
20060910 

un élève pose la question : Une jupe coûte 36 euros après une démarque de 20% quel est le prix de départ moi j'ai trouvé 45 euros mais je n'ai pas la formule de calcul exacte Claude Tardif lui répond. 





100 centimètres 
20021113 

Un élève pose la question : je voudrais savoir la contenance de 100 centimètres cube en litre? Diane Hanson lui répond. 





How to calculate percentage change 
20070803 

Galland pose la question : I am working on graphs and I need to find the percentage of increase from one figure to another. How do I do that? For instance staff hours for 2006 were 28011 and for 2007 were 31230. How do I find the percentage of increase? Stephen La Rocque lui répond. 





How to convert fractions to percentages 
20070705 

Anita pose la question : How do I turn 1 3/20 to a percent? Stephen La Rocque and Melanie Tyrer lui répond. 





Billions and more! and even more! 
20040301 

Steph pose la question : What comes after undecillion? Penny Nom lui répond. 





What percentage did I take? 
20170614 

david pose la question : you have $5.85 I took $1.06 from you,what percentage did I take? and the formula to solve it. Thank you Penny Nom lui répond. 





Canada's population as a percentage 
20170511 

bethmarie pose la question : What percentage of the world population (7.5 billion) is Canada's population (36 million).
Thank you very much! Penny Nom lui répond. 





Faster than as a percentage 
20170318 

Maximilian pose la question : Hi, i have a strange issue with the phrase "faster than" in percentage, ie. if i have a 10MB/s connection, and somebody has a 7MB/s connection, is it 30% faster or 50% faster.
which ( affirmation, phrase, sentence ) is the right one:
a:) My 10MB/S connection is 50% faster than the 7MB/s ?
or
b:) My 10MB/S connection is 30% faster than the 7MB/s ?
Thanks in Advance, and please if you can teach me why ! Penny Nom lui répond. 





Percentage change in productivity 
20170315 

Sunni pose la question : I'm working on a graph and I need to find the percentage of increase from one figure to another. How do I do that? For instance our department started with a workload of 1773 in Jan and ended with 341 in Dec. In addition to that we received 2088 new items from Jan  Dec with an average of 5 workers. How do I find the percentage of increased productivity if any? Penny Nom lui répond. 





Two concentric circles 
20161221 

shrestha pose la question : Two concentric circles have radii of 14 cm and 7 cm respectively. Find the area of space between them. Penny Nom lui répond. 





Joining a fitness center 
20161218 

Salem pose la question : A fitness center offers a special price for groupclass students. The cost of registration is 30 dollars and then you have to pay 25 dollars per month. What is the rule of the equation in the light of c=m+? Penny Nom lui répond. 





A sales tax of 7% 
20161207 

Kenneth pose la question : Hello:
If a sales tax of 7% is placed on every $1.00 of merchandise for sale, is it correct to indicate
the tax as 7%/ per $1.00 or 7%/$1.00? If the calculation is expressed as 7%/$1.00 X $5.00,
the tax is not $0.35 but 0.35. Is a tax rate of 7% incorrectly represented as 7%/$1.00
since the dollar unit cancels from the multiplication?
I thank you for your reply. Penny Nom lui répond. 





A mixed number as a percent 
20161018 

Jayda pose la question : how go you change a mixed number into a percent
Ex. 3 3/4 Penny Nom lui répond. 





The circumcentre of a triangle 
20160728 

Raj pose la question : If the vertices of triangle ABC are A(4,1) B(1,2) C(4,3) then find coordinates of circumcentre of triangle Penny Nom lui répond. 





One million is six percent of what number? 
20160426 

Colleen pose la question : One million is six percent of what number?
Thanks! Penny Nom lui répond. 





A percentage problem 
20160302 

jehanzaib pose la question : if x is a percentage: e.g. 40%
than what does "x/(1+x)" = 29%. what is the explanation. Penny Nom lui répond. 





Converting a fraction to a percentage 
20160222 

Preitty pose la question : How can I turn fractions into percentages when the denominator is not a number that can multiply to 100? Penny Nom lui répond. 





A bonus of 8% of sales 
20160222 

Barghavi pose la question : A man earns $325 per week plus an additional 8% on any sales over $500.
If he makes $6,250 in sales, how much money in total does he earn that week?
thank you! Penny Nom lui répond. 





38 is what percent of 400? 
20160207 

chris pose la question : 38 is what percent of 400? Penny Nom lui répond. 





Percentage reduction 
20160130 

Kuuku pose la question : The daily production targets in 2000 was 60,000 units this declined to 48,000 units in 2001 but was projected that further 300units reduction would be experienced in 2002. Calculate the percentage reduction by 2002. Penny Nom lui répond. 





Two increases of 20% 
20160127 

Z pose la question : How do I find how many books are in a library given a problem like this... The number of books increase after buying 20% more in May. The number increased again by 20% after they were given 300 books. How many books did it start with?. Penny Nom lui répond. 





Two increases of 20% 
20160127 

Z pose la question : How do I find how many books are in a library given a problem like this... The number of books increase after buying 20% more in May. The number increased again by 20% after they were given 300 books. How many books did it start with?. Penny Nom lui répond. 





Three discounts 
20160110 

Tiffany pose la question : Khairul wants to buy a sofa set. He is offered 3 successsive discounts of 10%,20% and 25%, and he can arrange them in any order he wants. Which order will benefit him the most? Explain your answer. Penny Nom lui répond. 





Book sales 
20151230 

Sandra pose la question : Your finance text book sold 56,500 copies in its first year. The publishing company expects the sales to grow at a rate of 20.0 percent for the next three years, and by 8.0 percent in the fourth year. Calculate the total number of copies that the publisher expects to sell in year 3 and 4. Penny Nom lui répond. 





Converting a fraction to a percent 
20151222 

Sharon pose la question : How do you turn a fraction into a percentage? I'm beyond confused with this. Even though I think of myself as a good math student doing 8th grade math at a young age, this just makes me want to scream! I get the way you turn 1/4 into 25%, but when it comes to something like 7/9 = ? I just can't figure out the answer. Penny Nom lui répond. 





A word problem with percentages 
20151205 

Caedryn pose la question : After giving 25% of her stickers away, May had 50% as many stickers as Rose. If they had 200 stickers altogether at first, how many stickers did Rose have? Penny Nom lui répond. 





20 million as a percentage of 7.3 billion 
20151118 

Nick pose la question : Based on the estimate of the worlds current population (7.3 billion people), I'm trying to work out what percentage of that figure 20 million people would amount to?
(Apologies in advance that I've no idea if the 7.3 billion figure is an American Billion or UK billion)
Thanks for any help.
Nick. Penny Nom lui répond. 





Two price reductions and a coupon 
20150916 

Suszanne pose la question : Mary purchased an item for 45% off the original price, plus an additional 20% off the sale price.She also had a $5 off coupon, which the salesclerk applied after these two discounts. Mary's final purchase price for the item was $50. She paid no sales tax, what was the original price of the item? Penny Nom lui répond. 





An increase in savings 
20150906 

A student pose la question : A man spends 80% of his income. His income increases by 40% and his expenditure also increases by 25%. Find the percentage increase in his savings? Penny Nom lui répond. 





Two concentric circles 
20150528 

Shannan pose la question : Two concentric circles have radii of 24cm and 26cm. What is the length of the chord that is tangent to the inner circle? Include a sketch Penny Nom lui répond. 





Locating the center of a circle that forms an arc 
20150423 

Ken pose la question :
Find the Cartesian coordinates of the center of an arc with the given location of the beginning and end points and radius length. Not the midpoint of the circumference but the actual point that the arc
is drawn around.
I know their are two answers depending on the direction of the arc. Unless we assume that all arcs are drawn counter clock wise.
Thanks
Ken
Harley Weston lui répond. 





Two concentric circles 
20150421 

Juniper pose la question : Two concentric circles have radii of 4 cm and 8 cm. A segment is drawn so that it is tangent to the smaller circle and a chord of the larger circle. How long is the segment? Penny Nom lui répond. 





The area of the ring between two concentric circles 
20150408 

Conner pose la question : The area of the ring between two concentric circles is 25pi/2 square inches. The length of a chord of the larger circle tangent to the smaller circle is? Robert Dawson lui répond. 





Commission 
20150313 

Rose pose la question : A shopkeeper receives 12.5% (12 1/2 %) commission on the sale of books from
the publisher. In a certain month,he receives a commission of rs.250 from the
publisher. How much was his sale for that particular month?? Penny Nom lui répond. 





The definition of percent ( % ) 
20150307 

Kenneth pose la question : Hello:
I saw this definition online from the Free Dictionary (The Free Dictionary.com) regarding the definition of percent (%):
"Noun 1. a percent sign  a sign (`%') used to indicate that the number preceding it should be understood as a proportion multiplied by 100."
What is this "proportion" multiplied by 100?
When I think of a proportion, I think of a/b = c/d. How can a number preceding the percent sign be understood as a proportion X 100?
I thank you for your reply! Chris Fisher and Claude Tardif lui répond. 





Two concentric circles 
20150225 

Manasi pose la question : The area between 2 concentric circles is 6 times the smaller circle. Radius of small circle is 7 cm. Find the difference in the circumference of the bigger circle ad the smaller circle? Penny Nom lui répond. 





The center and radius of a circle 
20150206 

ariana pose la question : I need to find the center and the radius of this circle. I don't know how to put 9/2
than square it into a fraction.
x^2 + 2x + y^2 +9y=5 Penny Nom lui répond. 





Two concentric circles 
20150125 

nazneen pose la question : select the correct answer from the given four options
given are two concentric circles. radii of outer circle & inner circle are r1 & r2 respectively.
the areas of inner circle & shaded ring are equal. the radii r1 & r2 are related by?
1. r1 = r2
2. r1 = r2*square root 2
3. r1 = r2*square root 3
4. r1 = 2r2 Penny Nom lui répond. 





Percentage change 
20150114 

Jim pose la question : When using a scale e.g. 010, what is the formula for calculating percentage change. For example when someone answers a questionnaire where a question has a 010 scale, and they score a 4 first time, and then they answer the same questionnaire a different day, and they score an 8, how do I calculate the percentage change. Penny Nom lui répond. 





Rates, percentages and units 
20141230 

Kenneth pose la question : Hello:
If percentages have no units, why are some percentages called rates, as in interest rate, or
perhaps a tax rate of 7% as an example? A rate has units of different quantities.
I thank you for your reply. Robert Dawson lui répond. 





30% profit 
20141205 

Lyn pose la question : I would like to know a formula that I would use on a standard calculator to calculate a 30% profit margin on an item.
If I purchased an item at $7.70 how would I calculate 30% profit for me, not just 30% mark up? Penny Nom lui répond. 





The region between two concentric circles 
20141027 

Ray pose la question : two circles, concentric; Given the length of chord of outer circle that is tangent to inner circle. what are the areas of both? how to calculate? Penny Nom lui répond. 





Percentages in a mixture 
20141002 

viola pose la question : Hi there
can you help me convert the below so it makes 100% (individual %)
400 gr =
100 gr =
50 gr =
50 gr =
20 gr =
2 gr =
1 gr =
1 gr =
Be great to hear back from you
Thank you
V Penny Nom lui répond. 





A price increase and a consumption decrease 
20140816 

sujan pose la question : If the price of petrol increases by 25% and Rajesh intends to spend only 15% more on petrol then by how much % should he reduce the quantity of petrol he buys? Penny Nom lui répond. 





What percentage of 317 million is 1.2 million? 
20140813 

Danielle pose la question : I would like to know what percentage of 317 million is 1.2 million. Tyler Wood lui répond. 





Ratios ond percents 
20140813 

aswathi pose la question : if the ratio of cost price and selling price of an article is be as 10:11,the percentage of profit is Tyler Wood lui répond. 





Buying shoes on sale 
20140630 

Willa pose la question : So, I have this question from my summer packet: "Gwen buys 3 identical pairs of shoes at store a. She pays $110.25 after the discount what is the regular price of each pair? ( 40% off)" Penny Nom lui répond. 





Mary's height as a percentage of Michael's height 
20140511 

Lauren pose la question : Mary is 1.4m tall and her brother Michael is 1.2m tall.
Express Mary's height as a percentage of her brother's. Penny Nom lui répond. 





Percentage change 
20140509 

hi pose la question : the hw club had 46 members in sept. in april, the
club had 24 members. what was the percent of change in the hw club's membership from sept. to apan increase or decrease in membership?
ril? what is Penny Nom lui répond. 





Decimals,fractions and percentages 
20140411 

Frances pose la question : Ask an expert to find out their real life usage of your topic... that is the question.
meaning what is your real life usage of using decimals,fractions and percentages.
This is all part of my math assignment to ask an expert real life usage... so please
reply back as soon as possible Penny Nom lui répond. 





A cyclic quadrilateral 
20140328 

Carly pose la question : Suppose ABCD is a cyclic quadrilateral, i.e A, B, C, and D are the points on a circle,
given in order going around the circle. Show that if we join each of A, B, C, and D to the orthocentre
of the triangle formed by the other three, then the resulting line segments all intersect in a common midpoint.
Thank you. Chris Fisher lui répond. 





Percentage increase of the population of a town 
20140328 

hunter pose la question : The population of a certain town in 1984 was 2900 people. The percent increase was 2.5% each year. What is the town's population in 2002? Penny Nom lui répond. 





40 meters increased by 20% 
20140314 

Kyle pose la question : I need help finding out this question:
40 meters increased by 20%
Is the answer 800 or is it 8? Penny Nom lui répond. 





A chord length of 2 cm 
20140313 

prema pose la question : I am having only chord length as 2cm. how to find arc length and degree Penny Nom lui répond. 





29% as a fraction 
20140307 

kylie pose la question : 29% into a fraction or mixed number Penny Nom lui répond. 





A circle graph 
20140306 

Caitlyn pose la question : I need to find the measure of the central angle that represents the amount of time spent on each activity.
My question includes a circle graph with the following: Sleep 31%, Other 15%, Entertainment 18%, Errands 7%,
Work 20%, and Food 9%. Penny Nom lui répond. 





Paycheck after deductions 
20140223 

Louise pose la question : So I got a paycheck for 89.02 they took out in deductions 15.69.
I want to know the percentage they are taking out so that I can figure my take home pay each week before I get it. So I know what to expect for pay each week so I can budget my bills from now on a weekly basis. If I know the percentage than I can just figure out the percentage through how many hours in the week I worked and multiply my gross pay and know what my take home will be Penny Nom lui répond. 





Three investment partners sharing the profit 
20140222 

Ayatullah pose la question : Hello;
We are three partners and bought a property at 2050000 and sold at 2300000.
Details of investment of the partners
X= 1500000
Y= 400000
Z = 150000
My questions are
1) How could i calculate percentage of investment of each partner?
2) How could i deduct 30% commission from each partner in profit?
3) How could i distribute the profit amongst the partners?
Thanks in advance Penny Nom lui répond. 





2.3% of $17.3 trillion 
20140221 

C pose la question : What is the annual interest on $17.3 trillion at a rate of 2.3%. Thank you Penny Nom lui répond. 





The grade of a road as a percent 
20140214 

Emily pose la question : What is the grade of the road shown below expressed as a percent rounded to one decimal place?
Rise is 40feet
Run is 380 feet Penny Nom lui répond. 





How many cubic centimeters are in a cubic meter? 
20140211 

merylin pose la question : How many cubic centimeters are in a cubic meter? Use a sketch to explain your reasoning. Penny Nom lui répond. 





A bizarre percentage problem 
20140129 

matthew pose la question : by what percent was the child's sodium level beneath the normal range?
the child's sodium level was 107 where the normal is 136145 Harley Weston lui répond. 





Profit as a percentage 
20140104 

Dane pose la question : If i brought a card for £5 and sold it for £10 what is my profit percentage? 50% or 100% Penny Nom lui répond. 





A sale price for a TV 
20131128 

tom pose la question : a TV can be purchased for $278 normally is $328. what is the percent of the present cost of this TV will you be saving? Penny Nom lui répond. 





2 concentric circles 
20131127 

Dimaris pose la question : The radius of the outer circle of 2 concentric circles is x. An
equilateral triangle inscribed in the outer circle also circumscribes the
inner circle. What is the radius of the inner circle in terms of x? Penny Nom lui répond. 





Solve for x 
20131012 

Megan pose la question : X\2400. Times 100=40%. What is x?! Penny Nom lui répond. 





A question on markup 
20130908 

ezile pose la question : if the gross profit for the previous year was R125000 and for the new year its R195000 the mark up achieved was 95%....whats the new mark up Penny Nom lui répond. 





1760 as a percentage of 5000 
20130905 

ken pose la question : how do I express 1760 as a percentage of 5000 Penny Nom lui répond. 





More than half of the people said... 
20130826 

Lucy pose la question : Hi,
The question is:
Samoa 23%
Brazil 41%
Sri Lanka 52%
Senegal 39%
Armenia 37%
Croatia 20%
Why is the following statement true for the data above: More than half of the people said they were interested in Sri Lanka. The reason I don't understand the problem is that because the percentages add up to be greater than 100%, that means that the 500 people(as stated in the question) who participated in the survey got to pick more than once. Therefore, it is not 52% out of 100% anymore.
Thanks for taking the time to answer my question. Robert Dawson lui répond. 





What percent is 50 of 4.5 billion? 
20130808 

Bobby pose la question : What percent is 50 from 4.5 billion? Penny Nom lui répond. 





Slicing through a cone to form an ellipse 
20130806 

Pulkit pose la question : we get an ellipse on slicing through a cone. Is there a relation between central axis of the cone and this ellipse?
Does it pass through the any of the foci of the ellipse? Chris Fisher lui répond. 





A mixture problem 
20130729 

Lucy pose la question : Hi,
For the following question:
Ten pounds of mixed nuts contain 50 percent peanuts. How many pounds of peanuts must be added so that the final mixture has 60 percent peanuts?(A) 2.5 (B) 5 (C) 6 (D) 10 (E) 12.5,
my math book gives my the following explanation: Try choice (C): 6 pounds of peanuts. The original 10pound mixture contained 50 percent peanuts, or 5 pounds. Now you have 11 pounds of peanuts in a 16pound mixture, more than 60 percent. This result automatically eliminates choices (D) and (E) as well.Why would this result automatically rule out D and E? How can you tell?
Thank you for taking the time to answer my question. Robert Dawson and Penny Nom lui répond. 





GST and PST 
20130722 

Bev pose la question : Total sales revenues are 116391.38 this amount includes 5% GST and 80% of this amount includes a 7% provincial tax. The other 20% is PST exempt. GST is included in all. How do I figure the PST I owe? Penny Nom lui répond. 





Percent and percentage point 
20130719 

Kenneth pose la question : Hello:
Does 0.01 represent both one percentage point and one percent in decimal form?
What is, for example, 2/100 of one percentage point, and what is 2/100 of one percent?
Are the answers the same.
I thank you for your assistance. Penny Nom lui répond. 





How much does Sara get to take home 
20130605 

Jessica pose la question : Sara gets paid $15.00 an hour. She worked 80 hours during the pay period. If 28% of what she earned is deducted for taxes, how much does Sara get to take home? Penny Nom lui répond. 





Percent change in sales 
20130604 

Sui pose la question : Hi,
I would like to ask your favor for reviewing the following percent change in sales calculation, did I do it right? I am surprise/wondering with the big amount of the percentage result. Your assistance and guidance would be highly appreciate.
Sales for month of August 2000: 5,198,750 IDR
Sales for month of October 2000: 62,291,700 IDR
Difference = 62,291,700 IDR  5,198,750 IDR = 57,092,950 IDR
Percentage change = 57,092,950 IDR : 5,198,750 IDR = 10.98 X 100 = 1,098%
Sales for month of February 2008: 1,664,800 IDR
Sales for month of August 2008: 161,715,307 IDR
Difference = 161,715,307 IDR  1,664,800 IDR = 160,050,507 IDR
Percentage change = 160,050,507 : 1,664,800 = 96.14 X 100 = 9,614%
Thanking you,
Sui Penny Nom lui répond. 





A pump is operating at 70% 
20130603 

Abdel pose la question : Hi I was wondering if you could help me out on a question I recently got on an aptitude test.
A pump operates at 70% if it is pumping out 4500 gallons then how much will it pump out at 85%? Penny Nom lui répond. 





Inverting fractions and percentage 
20130518 

Carlos pose la question : If I calculate the percentage change between two fractions, say,
1/100 and 2/100, I get 100% change. Now, if I flip denominator
and numerator, 100/1 and 100/2, and repeat the calculation, I
get a 50% change. Why are the percentages different?
Thank you very much Penny Nom lui répond. 





The percentage of fat in a container of yogurt 
20130517 

Katy pose la question : There is a question that I' having trouble with. It says: "A container of yogurt
contains 228 g of water, 54 g of carbohydrates, 12 g of protein and
6 g of fat, what percentage of the yogurt is fat?" How do you convert 6 g
into percentage? Penny Nom lui répond. 





25% 
20130328 

aaliyah pose la question : what is the raw data of 25% Penny Nom lui répond. 





A markup followed by a discount 
20130323 

edward pose la question : A shopkeeper marks his goods to gain 35%. He allows 10% discount for cash payment. What is his profit percent when he sells the goods for cash? Penny Nom lui répond. 





Percent profit: State exam question 
20130312 

tony pose la question : which is the correct way to figure 30% profit?
1)
1000 product
500 labor
50 permit
1550 total cost
1550x1.3=2015
2)
1000 product
500 labor
50 permit
1550 total cost
1.3=.7
1550/.7=2214 Harley Weston lui répond. 





state exam question 
20130312 

tony pose la question : which is the correct way to figure 30% profit?
1)
1000 product
500 labor
50 permit
1550 total cost
1550x1.3=2015
2)
1000 product
500 labor
50 permit
1550 total cost
1.3=.7
1550/.7=2214 Harley Weston lui répond. 





Increasing and decreasing sales 
20130306 

Meghan pose la question : Pace Design's sales increased by 30% in the first year, increased by 60% in the second year, decreased by 60% in the third year and increased by 90% in the fourth year. What was the cumulative change in sales over the 4 years? Penny Nom lui répond. 





What is the subtotal & GST? 
20130304 

REBECCA pose la question : Hi, I have a total of $300.
What is the subtotal & GST?
How do I work backwards? Penny Nom lui répond. 





Markup and discount to get a sale price 
20130302 

Warren pose la question :
If you are an ardent shopper you will be aware of the discount (% decrease) marketing strategy to produce the sale price. I began to wonder just how much markup (% increase) was added initially to an item in order to deliver the discounted sale price.
It was simple to construct a formula to convert one to the other.
For example a 30% (mark down) decrease in price required a 42.86% (mark up) to increase the price initially to Tag price. However when I started apply the formulae to a number of circumstances I noticed some very interesting circumstances associated with this relationship
For example a 99.999999% decrease is numerically equal to a 9,999,999,925% increase (huge ratio difference) while conversely a 0.1% decrease is numerically equal to a 0.10010010% increase (Infinitesimally small ratio difference) so the patterns appears logarithmic not linear.
However what really caught my attention was this pattern
See http://www.ozsmart.com/doc/percentage.htm
My questions is why does the decline in the ratio of increases in required mark up (%) price peak at 50 and 51% precisely and then expand again as the percentage move higher
Any explanation would be appreciated Harley Weston lui répond. 





Percent as a fractional relationship 
20130114 

Kenneth pose la question : What does the following indicate?
"A percent is another way of expressing the ratio or fractional relationship
of two numbers."
I know what a ratio is, but the term "fractional relationship" confuses me.
I thank you for your reply. Penny Nom lui répond. 





The circumcenter 
20121209 

BandNerd pose la question : I need to find the circumcenter of the triangle with the coordinates A(0,0) B(12,6) and C(18,0). I do not understand how to solve it algebraically. Please help! Chris Fisher lui répond. 





How much should I price the earrings? 
20121113 

Sharon pose la question : I want to sell some earrings and make a $12.00 profit on them I have to pay a
35% commission on them. How much should I price the earrings? Penny Nom lui répond. 





Percentiles 
20121017 

Kenneth pose la question : Question from Kenneth:
Hello:
What is a common calculation used to determine percentiles?
For example, five employees have the following salaries:
Office worker 1  $25,000
Office worker 2  $27,000
Office worker 3  $30,000
Office worker 4  $32,000
Office worker 5  $35,000
What is the percentile rank of office worker 3 who earns $30,000?
Here's what I know: Add the number of salaries. Total: 5
Add the smallest number of salaries less than $30,000. There are two.
Now, divide 2 by 5 and multiply by 100. 2/5 * 100 = 40
I think the office worker making $30,000 is in the 40th percentile.
and I'm not sure what this ranking indicates.
I thank you for any helpful reply and or different calculation. Harley Weston lui répond. 





The degree measure of the central arc of a circle 
20121017 

Crystal pose la question : On a circle with radius of 12 cm is an arc of length 20 cm. What is the degree measure of the central angle used to make this arc? Penny Nom lui répond. 





GST in New Zealand 
20121010 

Colleen pose la question : I work out my claimable gst each month but need to know the total sales or purchases amounts for filling in my six monthly paper work. How do I do that. I tried doing the opposite of calculating the gst i.e. x3 and /23 but it is slightly different to my total. Penny Nom lui répond. 





What percent of her monthly take home pay are her monthly expenses? 
20120919 

tina pose la question : a girls monthly take home pay is 1932.00. her monthly expenses total 1910.00. What percent of her monthly take home pay are her monthly expenses? Penny Nom lui répond. 





A profit of 35% 
20120907 

Jack pose la question : If a product cost me $10.00 and I want a profit of 35% what is my sell price? How do I figure the sale price to make a 35% profit on the sale? Penny Nom lui répond. 





Changing a decimal or a number to a percent 
20120810 

Kenneth pose la question : When a decimal or a number is changed to a percent, the decimal or number is multiplied by 100 and then a percent sign (%) is attached.
Why is it necessary to multiply by 100?
What is the reasoning or logic for using this calculation? Robert Dawson lui répond. 





A garden in the back yard 
20120804 

Lucy pose la question : Your boss says that his wife has put an 18 × 51 foot garden in along the whole back end of their back yard. He says that this has reduced the backyard lawn area by 24%. What are the total dimensions of his back yard? What are the dimensions of the remaining lawn area? I found this question on purplemath(http://www.purplemath.com/modules/percntof3.htm). I still don't understand how to solve it. Can you walk me through the process please?
Thank you in advance for taking the time to answer my question. Penny Nom lui répond. 





Percentage increase 
20120801 

Jay pose la question : When calculating percentage growth, why is (yx)/x the same as
(y/x)1 ??? (I seem to be stuck on the simple algebra here)...
e.g. 2011, toy was £5, 2012, toy is £10. What is the percentage
increase? So, (105)/5 = 1 (i.e. 100% increase), AND, (10/5)1 = 1
(i.e. also 100% increase).
Thanks in advance. Penny Nom lui répond. 





A truncated cone: the central angle 
20120717 

Tom pose la question : I have researched several sites, including this one and am fairly confident I can do the calculations required to produce the two radii and the slant height for a truncated cone.
I a somewhat confused by the central angle. Some sites indicate that it should never exceed 180 degrees while others do not. Different examples on your site seem to use this in two different ways in constructing a truncated cone.
Sometimes the angle seems to indicate the section to be removed, while in other examples the angle seems to indicate the section to be saved. Since the two angles will always total 360 I am confused about how to use the info to
calculate the minimum rectangle required to contain the pattern. I'm guessing that in some cases I may need to use the chord or sagitta to determine the desired height and width of the material. Any help is greatly appreciated.
Thank you.
Tom Penny Nom lui répond. 





Finding the circumcentre 
20120524 

Glen pose la question : Hi,
I'm having trouble finding the circumcentre of these 3 coordinates A(1,1) B(10.5,1) and C(6,6).
I understand what circumcentre is but I cannot work out where it is.
Thanks very Much,
Glen Chris Fisher lui répond. 





The circumcentre and orthocentre of a triangle 
20120425 

Nazrul pose la question : The circumcentre and orthocentre of a triangle is given. A point on a side of the triangle
given. A vertex of the triangle on the circumcircle is also given.
How can I draw the triangle?
Please Help me.
Thank you for answering my previous questions. Chris Fisher lui répond. 





The circumcentre, centroid and orthocentre of a triangle 
20120424 

Nazrul pose la question : The circumcentre, centroid and orthocentre of a triangle is
given. The distance between circumcentre and orthocentre is also
given.
How can I draw the circle?
Please Help me. Chris Fisher lui répond. 





Percentage change 
20120419 

Christine pose la question : For my intermediate macroeconomics class, there is a question about percent change.
The numbers are:
Quantities of oranges in 2010: 104
Quantities of oranges in 2009: 100
How would I calculate to find the percentage change in quantities? Penny Nom lui répond. 





Profit as a percent 
20120414 

Anson pose la question : The cost price of a CD is $50 and its marked price is $105. If the
selling price is $88, find the profit percent. Penny Nom lui répond. 





A Performance Appraisal 
20120306 

Reuel pose la question : Hello:
I'm looking for an answer to this one:
If I have 428 staff for Performance Appraisal the year 2011 my
suggestions for rating their rankings would be:
5% can be no. 1 which would mean 21 employees
15% can be no. 2 which would mean 64 employees
60% can be no. 3 which would mean 257 employees
15% can be no. 4 which would mean 64 employees
5% can be no. 5 which would mean 21 employees
However, what I have received is this:
5% are no. 1 which would mean 20 employees
22 % are no. 2 which would mean 94 employees
60% are no. 3 which would mean 270 employees
15% are no. 4 which would mean 41 employees
5% are no. 5 which would mean 3 employees
Now my question is how do I find the percentage difference between both
the scenarios of should be versus reality? I don't think it is normal subtraction, is it? any help would be appreciated.
Best Regards,
Reuel Harley Weston lui répond. 





[Difference between percentages and percentages] 
20120306 

Reuel pose la question : Hello:
I'm looking for an answer to this one:
If I have 428 staff for Performance Appraisal the year 2011 my
suggestions for rating their rankings would be:
5% can be no. 1 which would mean 21 employees
15% can be no. 2 which would mean 64 employees
60% can be no. 3 which would mean 257 employees
15% can be no. 4 which would mean 64 employees
5% can be no. 5 which would mean 21 employees
However, what I have received is this:
5% are no. 1 which would mean 20 employees
22 % are no. 2 which would mean 94 employees
60% are no. 3 which would mean 270 employees
15% are no. 4 which would mean 41 employees
5% are no. 5 which would mean 3 employees
Now my question is how do I find the percentage difference between both
the scenarios of should be versus reality? I don't think it is normal subtraction, is it? any help would be appreciated.
Best Regards,
Reuel Harley Weston lui répond. 





Percentage of water in a soil sample 
20120301 

avi pose la question : what i need is the formula in getting the percentage from gram.
situation:
i need to know how many percent will i declare in getting the moisture of a soil sample
i weighed 2,000 grams of soil before i dried it out in the oven, after few hours the recovery
of the dried out soil is 1,700 grams. How many percent will be the water content?
kindly send me a formula in computing this.
thank u very much! Penny Nom lui répond. 





38/50 as a percent 
20120206 

2 pose la question : 38/50 in a percent Penny Nom lui répond. 





Expressing 0.5% 
20120206 

Kenneth pose la question : Hello:
It is correct to express 0.5% as 5 tenths of one percent.
Is it also correct to express 0.5% as 5 tenths of onehundred percentage points or 5 tenths of one percentage point?
I think it would be 5 tenths of one percentage point because 5 tenths of onehundred percentage points would be 50 percentage points, but I'm not sure.
I thank you for your reply. Penny Nom lui répond. 





A circular cylinder circumscribed about a right prism 
20120125 

Noriz pose la question : A cylinder is circumscribed about a right prism of altitude 12.6cm.
Find the volume of the cylinder if the base of the prism is an
isosceles triangle of sides 3cm by 3cm by 2cm.
Hope you can help me with this. Penny Nom lui répond. 





Ten percentage of 24 hours 
20120123 

robin pose la question : Hai.. Myself Robin.. May i know the ten percentage of 24 hours? Pls help me.. Thank you. Penny Nom lui répond. 





75% of 12.5 
20120105 

Jennifer pose la question : 75% of 12.5
Please explain how you got your answer cause I don't understand how to do this Penny Nom lui répond. 





A 46% increase 
20120103 

kabilan pose la question : increase a price of £8.24 by 46% and give the answer to the nearest penny Robert Dawson lui répond. 





A 6% commission 
20111015 

Tamara pose la question : if you earned a gross wage of $810, which includes a salary of $90 and a 6% commission how much is the net sales? Penny Nom lui répond. 





Eight percent 
20110922 

Michelle pose la question : Hello. I need help with a math problem please. I have not done this in so long.
This is a 40% margin
360X8%= Penny Nom lui répond. 





The dimension of the box in centimetres 
20110827 

Eliza pose la question : Find the dimension of the box in centimetres. Then find its volume in cubic centimeters.
The box is 0.7m (l) 0.4 (h) 0.2 (w) Penny Nom lui répond. 





What is the angle of decent? 
20110520 

Taten pose la question : So you have an airplane with an altitude of 5.8KM. It has 46KM till the run way. What is the angle of decent? Penny Nom lui répond. 





Why use percentiles? 
20110429 

Kenneth pose la question : I need some clarification regarding the word "percentile."
Here is an example and what I know: If an investor had twenty stocks in his portfolio and five of those stocks paid an annual dividend of $200.00 or more, the five stocks are in the 25 percentile.
Why is this word necessary? If my example and explanation is correct, why not simply indicate that 25% of his stocks paid an annual dividend of $200.00 or more? Penny Nom lui répond. 





Converting millimeters to centimeters 
20110404 

Pat pose la question : I need to convert 67 mm to centimeters how do I do this? Penny Nom lui répond. 





3% commission 
20110401 

bertha pose la question : A real estate broker’s base annual salary is $18,000. She earns 3% commission on
total sales. How much must she sell in real estate value during the year to earn
$65,000? Set up an equation and solve. Show all work to receive full credit. Round
final answer to the nearest dollar. Penny Nom lui répond. 





A 15% increase 
20110322 

Abeth pose la question : Bobby dela Cruz is the purchasing agent for school supplies of a certain university. Because of new research projects, Bobby ordered an additional 32,500 worth of supplies this month. This is a 15% increase from last month. What was the value of the school supplies that Bobby ordered last month? Robert Dawson lui répond. 





6685 is 67.5% of the total number 
20110222 

Donna pose la question : I know 6685 is 67.5%. How do I calculate the total number. Penny Nom lui répond. 





Profit as a percentage 
20110117 

Connie pose la question : I am trying to determine the profit margin on selected items.
ex: A bottle of juice costs me $.70, I sell it at $3.75. How can I determine what my profit percentage is? Penny Nom lui répond. 





Profit as a percent 
20101219 

gaurav pose la question : In the following, which calculation is right to calculate the profit percent.
if profit is 20% 100*1.2 = 120
if profit is 20% 100/0.8 = 125? Penny Nom lui répond. 





The percentday method 
20101204 

Kenneth pose la question : I read about this method in an old business mathematics book and was curious about how it works to produce the correct answer.
“Percentday method is based on 360 days’ time and 1% interest. Any interest rate multiplied by any number of days is equal to so many %days.”
Example: 82 days at 5% equals 410%days. Penny Nom lui répond. 





A 35% profit 
20101119 

Ana pose la question : You have a stamp collection and make a 35% profit by selling it on EBay for $2700. Find the original cost of the collection by using the formula:New value × 100 / 100 + percent change = Original value Stephen La Rocque lui répond. 





I want to make a 50% profit 
20101029 

Debbie pose la question : If my cost on an item is $32.00 and I want to make a 50% profit What would the retail be? Penny Nom lui répond. 





Area on a dart board 
20101011 

Robert pose la question : A dart board consists of concentric circles and line segment. the radius of the bull's eye is 4 inches and each ring surrounding the bull's eye is 3 inches wide.
a) what is the area of the bull's eye
b) what percent is the bull's eye.
hint there are 4 rings and the bull's eye is divided into 4 (90) degree angles (meaning 1/2 up and down) (1/2 left to right. Stephen La Rocque lui répond. 





An investment of 500$ 
20100927 

georgia pose la question : if you invest 500$ at a 7% annum and the balance at a 10% annum and your interest earned is 44$ annum how much was invested in the 7% and how much in the 10%. Penny Nom lui répond. 





Percentage of Revenue Generated 
20100922 

Jeri pose la question : Hi! I am trying to fill out the government form for obtaining a business license and this is all new to me...it wants to know the estimated percentage of revenue that my product generates. An easy formula to figure this out would be greatly appreciated! Stephen La Rocque lui répond. 





The new diameter is 50 per cent larger than the original. 
20100904 

mahwish pose la question : . A circular logo is enlarged to fit the lid of a jar. The new diameter is 50 per cent larger than the original. By what percentage has the area of the logo increased? Tyler Wood lui répond. 





Percentage improvement 
20100826 

shahrukh pose la question : Hi...
We had a web page that was taking 12 secs to load. Now it loads in 3 secs.
What is the percentage of improvement or how much faster is it working now.
TO me it looks like it is working 3 times faster or there is a 300% improvement in the loading time.
However my client says its ((123)/12*)100 = 75% improved. Which seems illogical on the face of it.
Thanks for your help
Shahrukh Robert Dawson and Chris Fisher lui répond. 





$1579 is 20% of what number? 
20100722 

Luis pose la question : Question: $1579 is 20% of what number? Robert Dawson lui répond. 





Selling price, cost and profit 
20100622 

Alex pose la question : The profit on a certain television set is 16.5% of the cost price. If the profit is $330,
Find:
a) the cost price
b)the selling price of the television Penny Nom lui répond. 





A loan 
20100616 

melody pose la question : LOAN: 1000
TERM: 2 years
INTEREST: 2% (per month)
AMOUNT: ???
what is he formula of solving this and what is the answer.. Robert Dawson lui répond. 





What is 13% of $5.99? 
20100615 

Paige pose la question : What is 13% of $5.99 ? Penny Nom lui répond. 





Comparing percentages 
20100614 

Anouska pose la question : In category A, Annie gave 5 out of 6 responses. I make this 83%
I the same category, Adam gave 4 out of 10 responses. I make this 40%
Does this mean that Annie gave 43% more responses in this category than Adam? Robert Dawson lui répond. 





A comparative report 
20100527 

jo pose la question :
Question from jo:
I have a comparative report and I was confused about how to get the percentage of the current 1st quarter vs. last year 1st quarter, vs. last year of the same month. I hope you could help me, thank you.
Example: Food sales: 3Day Sale Event
TY: 1,352,293.58 May (Back to School)
LY: 1,205,614.31 April (Summer Sale)
LY: 1,065,693.40 May 2009 Penny Nom lui répond. 





Percentage of Group B's score 
20100522 

Carolyn pose la question : If the CONTROL Scorer A scored 5 minutes of Stage 1 sleep, and the compare Scorer B scored 7 minutes of Stage 1 sleep out of the same sample, what is the % similar/same is Scorer B to the Control Scorer A? Tyler Wood lui répond. 





Percentage increase 
20100520 

Rebecca pose la question : Question from Rebecca:
In 2008 my land was valued at $84,000. In 2009 my land was revalued at $235,000.00. What is the
percent increase between the two values? I want to be able to express "the
value was increased by x%." Harley Weston lui répond. 





One in twenty as a percentage 
20100427 

jim pose la question : Please advise how I work out a gradient of say 120 one in twenty as a percentage % Penny Nom lui répond. 





Commission 
20100424 

TAHIR pose la question : I want to predetermine the amount of commission on sale of my product which will be the amount that I shall have to pay .
For example, the price is $ 600and commission 5% .
1) I calculate commission on 600 @ 5% = $ 30
When added $ 600 the retail price = $ 630
2) But on $ 630, 5% commission = $ 31.50
So we make a loss of $ 1.50 .
3) Again if we add this $ 1.50 to $ 630 the price = 631.50
But the commission when calculated does not tally
and we make a loss of $ 0.075.
Please let me know how to determine the commission beforehand so that it matches our accounts. Penny Nom lui répond. 





Profit 
20100421 

joyann pose la question : a Raleigh road runner 16" unisex bike which cost $892 was sold for $1052.56 calculate
A. the profit made on the bike
B. the percentage profit Penny Nom lui répond. 





Splitting the mortgage payment 
20100409 

Jodi pose la question : What percentage of $2,500.00 (monthly mortgage payment)would I pay per month  if I make $2,200.00 per month and my partner makes $6000.00 per month?
Thank you. Tyler Wood lui répond. 





Total tax 
20100331 

Keli pose la question : if the gst in Ontario is 5% and the pst is 8% the total tax would be 13%. How come the total tax is 1.13? Shouldn't it be 0.13? Robert Dawson and Tyler Wood lui répond. 





A 25% discount 
20100329 

Susan pose la question : If something costs 1.00/per lb. and that price includes a 25% discount. How do you calculate what the price was before the discount? Penny Nom lui répond. 





I want to add 4.3% 
20100310 

Brandy pose la question : I am trying to find out a total. I have 7,118.00 and I want to add 4.3% to that total. How do I do that. Penny Nom lui répond. 





How many people in total came to the museum that day? 
20100305 

simon pose la question : 1354 people attended exhibition A and 1427 people attended exhibition B. 79% of people attended both exhibitions. How many people in total came to the museum that day Penny Nom lui répond. 





15% profit 
20100221 

daviann pose la question : calculate the cost price,given
selling price=$304
percentage profit=15%
what is the answer? Penny Nom lui répond. 





The center of a rectangular room 
20100216 

Diana pose la question : Consider a rectangular room, 15 feet wide, 30 feet long and 12 feet high. What is the exact distance from any of the 8 corners of the room and its geometric center? Can you write a generic formula for such a distance? And if we keep the same proportions on all dimensions, can you write an expression for the same distance as a function of the floor perimeter? Penny Nom lui répond. 





23 correct out of 28 as a percentage 
20100205 

Renay pose la question : What is the correct way to figure a percentage like 23 correct out of 28? Penny Nom lui répond. 





A decrease in travel time 
20100130 

Mike pose la question : if a 100 mile trip averages 50 miles per hour, how much distance does one need to travel at 90 miles per hour to decrease travel time by 10% Stephen La Rocque lui répond. 





A 20% markup 
20100122 

barbara pose la question : i ran across the same question using 10%, my question is this, I have $751,400, which has been marked up 20%. I want
to know the original amount prior to mark up.... can you give me the formula.? Penny Nom lui répond. 





What percentage am I reducing it by? 
20100113 

Lynda pose la question : I need to calculate the percentage of a total number.
If my total is 2.9 million and I take out 187,000 what percentage am I reduing it by? Penny Nom lui répond. 





Percentage increase from a negative to a positive 
20100112 

Greg pose la question : If a company had a net lost in 2005 of $11,234 and net income of $3231 in 2006, what is the percentage annual growth in income between the two years? Robert Dawson lui répond. 





Two percent 
20091220 

Brian pose la question : Hello I am having a problem figuring out something. Someone told me that .98 is the same as 2% how is this possible, how did they figure this out
here is my example 929.79 x .98 = 911.19, is the same as 929.79 x 2% = 18.59, now minus the 18.59 and you will end up with 911.19, how did they convert 2%
to .98, please help thgis is driving me nuts as I am not very good at math. Thank you
Warmest Regards
Brian Penny Nom lui répond. 





Percentage reduction 
20091215 

John pose la question : Please explain how I should calculate the percentage of £676 billion reduced to £498billion Harley Weston lui répond. 





Deducting 10% from £100 
20091117 

Steve pose la question : What is the correct way of deducting 10% from £100?
Would it be £100 multiplied by 0.1 and then deduct to leave you £90; or
Would it be £100 divided by 1.1 to give you £90.91? Penny Nom lui répond. 





A markup and a discount 
20091115 

joe pose la question : I have a product that cost $ 300.00 I want a 25% markup and give a 15% discount
but keep 25% markup.
300 + 25% = 375
300 + 40% = 420
420  15% = 357
what am i doing wrong???? Harley Weston lui répond. 





Find the original price 
20091106 

Cyndy pose la question : Find the original price of a pair of shoes if the sale price is $98.00 after a 30% discount. Penny Nom lui répond. 





Commodity price increase 
20091104 

bharat pose la question : if price of a commodity increases by x% the to keep the expenditure same
the decrease in consumption should be (x/(x+100))*100, why? Penny Nom lui répond. 





Concentric circles 
20091014 

maddy pose la question : Find the exact area of the region bounded by two concentric circles with radii 10 inches and 6 inches. Penny Nom lui répond. 





Grams to percent 
20090920 

brandy pose la question : how do you convert 1.5 grams to a percent Stephen La Rocque lui répond. 





A 30% markup 
20090902 

Lisa pose la question : Ok i want to mark a products up 30%, I would take 5.00X3o%,but my boss does it another way I have yet to figure out he takes cost divided by 70% or something like that I am so lost can you help? PLEASE Victoria West and Penny Nom lui répond. 





Percentage price change 
20090827 

alicia pose la question : what is the percentage price change between R66R10 if the answer between the two is R56 Penny Nom lui répond. 





Find the central angle 
20090818 

Larissa pose la question : In a circle, the length of a chord AB is 4 cm and the length of the arc AB is 5 cm. Find the central angle theta, in radians, correct to four decimal places. Then give the answer to the nearest degree. I think I'm supposed to use Newton's method, but am not sure how to start with this problem. Harley Weston lui répond. 





Susan's RRSP 
20090805 

Polly pose la question : Susan contributed $500 every 6 months for 14 years into a RRSP earning interest @ 7.5% compounded semiannually. Seven years after the last contribution Susan converted the RRSP into a RRIF which is to pay her equal 1/4 payments for 16 years. If the first payment is due 3 months after the conversion into the RRIF and the interest on the RRIF is 9% compounded 1/4, how much will Susan receive every 3 months? Stephen La Rocque lui répond. 





Percentage decrease 
20090804 

Bill pose la question : How to calculate the Percentage Increase or Decrease of a $ value.
Example 
Site Spend for 01012008 thru 073108 was $ 3,465,660
Site Spend, 2009 YTD as of 073109, was $ 1,673,405
Site Spend down what % between these two amounts ? Penny Nom lui répond. 





Percentage of Acid 
20090717 

Leeanne pose la question : here is my question:
a chemist has 200 liters of solution that is 5% acid. how many liters of water
(0% acid) must he add to make a solution that is 4% acid? Stephen La Rocque lui répond. 





Profit as a percentage 
20090715 

Jay pose la question : If I buy an item for $3.00 and sell it for $6.00. What is my percentage of profit? Penny Nom lui répond. 





The retail price for an ice cream scoop 
20090705 

Patricia pose la question : Hi  I am trying to figure out the fairest retail price for an ice cream scoop. We have an ice cream parlor
and the cost of the ice cream we buy by the bulk container has recently been increased so now we must charge
more for our scoops. We pay a wholesale price of $25.40 for 242 ounces of ice cream. The cost per ounce is
$0.105. What is the formula for figuring out how much to charge retail per scoop? This is probably so simple
but confusing to me. Please help. Thank you! Harley Weston lui répond. 





17.5% of 500 
20090705 

b pose la question : what is 17.5% of 500 Harley Weston lui répond. 





Descending Percentages 
20090702 

Chris pose la question : Hi
I'm having a problem working out the percentage target achievement, when i'm
calculating a descending indicator. For example, if you take something like
the number of contracts cancelled. You might give your retentions team the task
to make sure that no more than 2 customers cancel a contract wihin a particular
month. If exactly 2 customers cancel their contract, that should represent 100%
achievement of the target, but i'm really struggling to work out what that percentage
would be if 1 or 3 customers cancelled.
Chris Janice Cotcher lui répond. 





Fish Feed 
20090701 

David pose la question : 57 grams of feed how many fish can I feed at 2% of 1lb body wieght or I suppose to feed 2% of body wieght of food in grams fish wieghts 1 lb.I hope I said that write
Thank you Aloha dave Janice Cotcher lui répond. 





Averaging percentages 
20090614 

Alan pose la question : Can you add percentages and then divide them by the number of percentages to get the average percentage.
I.E day 1 100% day 2 100% day 3 95% average= 98.3%
is the above possible or is it not done, I have a dispute with a work colleague over this.
many thanks Harley Weston lui répond. 





How much more volume is needed to reach a certain % 
20090529 

Chris pose la question : I am trying to figure out how much more volume is needed to reach a certain %. For example if I sell 15,182 of unit X out of 43,241 total units. Then I know that unit X is 35.1% of units sold. However, I need to get unit X to be 46.3% of total units sold. I need to figure how many more units of X I need to sell to reach this %. Of course if I sell more units of X then this increases the denominator. Can you please help? Thank you for your time. Penny Nom lui répond. 





Profit margin 
20090526 

andreya pose la question : what is the profit margin of a business that spends $200 in order to make $1000 Penny Nom lui répond. 





A car loan 
20090506 

Cindy pose la question : A person takes out a car loan in the amount of $11,170.00 @ 4.5% interest. The person makes 17 payments of $500.00, then for the 18th payment (this person 'finds' some $) and pays off the whole thing. How much was their last (18th) payment? How much overall did they pay in principle? and interest?
The person who made the initial loan then takes $11,156.25 and places it into a High Interest Savings Account @ 2.25% annually on Nov 18, 2003. How much is now in the High Interest Savings Account if no futher funds have been added to the account and no withdrawls have been made?
Thanks for your help with this. I have been trying on and off for 3 years to figure this out.
C Robert Dawson lui répond. 





Decimeters and centimeters 
20090430 

Jeannette pose la question : I cannot convert because of a question that throws me off. For example, A mother African elephant avg's 250 dm in height. A newborn baby African elephant avg's 89cm in height. How many cm shorter is the baby African elephant than its mother? Which one do I convert first? in order to subtract the number from the baby? Penny Nom lui répond. 





12% of 4 trillion 
20090425 

ROBERT pose la question : WHAT IS 12% OF FOUR TRILLION Penny Nom lui répond. 





Percent increase from a negative number to a positive number 
20090421 

Brian pose la question : I have no problem calculating year over year net profits but am having trouble when it comes to a negative.
2007 Net Profit = 110,333.00
2008 Net Profit = 66,054.00
Brian Harley Weston lui répond. 





The center of an ellipse 
20090421 

Nae pose la question : what is the ellipse center of 5x^2+3y^2=15 Stephen La Rocque lui répond. 





Change 5/6 into a percent 
20090415 

Shelly pose la question : My question is when it says change 5/6 into a percent Penny Nom lui répond. 





$65.09 is 70% greater than the average price 
20090411 

Kelly pose la question : Hello!
I know you might be thinking that I didn't look through your previous answers, but I really did.
Here's my dilemma I have a percent increase equation that is missing the 'old" value.
I know that $65.09 is 70% greater than the average price, but I do not know the average price. How do I go about finding that?
I tried to set up an equation, but its throwing me off because the unknown variable is in there twice, and it's been a long time since I've taken math
Thank you for your help...greatly! Penny Nom lui répond. 





Actual Food Cost is 3% or more above Projected Food Cost 
20090407 

Kam pose la question : Your store guidelines states that when Actual Food Cost is 3% or more above Projected Food Cost, immediate corrective action be taken by the Unit Manager. In January, your Actual Food Cost was $11,000, and your Projected Food Cost was $10,850. To find out what percentage the difference is do I divide the difference ($150) by Actual Food Cost ($11,000) or Projected Food Cost ($10,8500)? What would be the answer? Thanks Harley Weston lui répond. 





The central angle of a chord 
20090406 

Dale pose la question : How do I find the central angle if I only have the cord length and radius. Harley Weston lui répond. 





Payroll deductions 
20090329 

Jim pose la question : I want to set up a spread sheet where i can enter my hourly pay or gross income,
and calculate my tax deductions. I have my old pay stubs but I am stuck when I
take the amount of the deduction and try to figure out the % used to calculate the amount
for example gross pay $1359, EI= $64, Fed Tax=$129, Prov tax = $35
these numbers I have provided are random but I think you can get the idea Penny Nom lui répond. 





Profit as a percent 
20090326 

Danny pose la question : If I have something that cost me .38 and I want to sell it for $1.00 what is my profit % on this item Robert Dawson lui répond. 





Percentiles 
20090321 

Shawn pose la question : For a normal distribution of u=654.00 and o=138.00.
What is the percentile rank for X=426? Harley Weston lui répond. 





How do I calculate to find what 100% is? 
20090321 

Kathy pose la question : If $13.50 is 32% of a number, how do I calculate to find what 100% is? Stephen La Rocque lui répond. 





Find the retail price 
20090318 

Allie pose la question : If you have food that costs $0.75 per portion and your food cost is 16.5% how would you find the retail price? Penny Nom lui répond. 





0.0007 as a percent 
20090318 

Shelly pose la question : I need to know how to divide 0007 by 100 and soon! and I have no idea how I can get 100 to go into a number like that! here's the question this problem originated from:
change the decimal into a percent:
0.0007 _________
How do I change THAT number into a percent?
How do I change 12.455 and 92.348 and 29.005 into percents as well? I know how to change numbers like 0.6 and 0.70 into percents but not the numbers I told you I'm having problems with. Please someone explain this to me and also please focus mainly on the first number I asked about but don't forget the others please. Please reply ASAP I need to know this in about a week or less! Penny Nom lui répond. 





What percentage is £2,407.33 of £9,352.41? 
20090316 

Joanne pose la question : Could you show me how to work out what percentage £2,407.33 is of
£9,352.41 in very basic terms.
Thank you very much
Joanne Penny Nom lui répond. 





Express 13 mills as a decimal part of $1.00. 
20090313 

Kenneth pose la question : Hello:
I read the following in an old business mathematics textbook:
"Express 13 mills as a decimal part of $1.00."
I can determine the answer as follows: There are 1000 mills in or per
$1.00. 13 mills divided by 1000 mills/$1.00 equals $0.013, the answer.
My question is as follows: What does "...as a decimal part of $1.00"
indicate or represent from "Express 13 mills as a decimal part of
$1.00."?
Is (a decimal part of $1.00) any decimal less than $1.00 with the decimal having a dollar sign
before it.
I thank you for your reply. Harley Weston lui répond. 





66 2/3% 
20090310 

Traci pose la question : Please convert 66 2/3% into a decimal and a fraction Penny Nom lui répond. 





What percent commission does Aaron earn? 
20090309 

Jerry pose la question : Aaron works part time as a salesperson for an electronics store. He earns $4.75 per hour plus a percent commission on all of his sales. Last week Aaron worked 20 hours and earned a gross income of $143.75. If his total sales for the week were $1,500, what percent commission does Aaron earn? Penny Nom lui répond. 





A property that decreases in value every year by 10 percent 
20090307 

PEter pose la question : there is a competition problem where a cottage is worth 25000 years, but it decreases in value every year by 10 percent. Without a calculator, is there a way to find after how many years, the cottage will be worth 2500? (besides multiplying it out and besides logs) Stephen La Rocque lui répond. 





An annuity 
20090227 

Jules pose la question : R 20 000 is deposited in the bank,at the end of each year R 5 000
is withdrawn from it, the interest is 13 percent compounded monthly.
Calculate how many years that person will be able to use his/her money ? Stephen La Rocque lui répond. 





More on the gst 
20090223 

melissa pose la question : I need to know the amount of gst that was in the amount of 630.67? How do you figure this out? I don't need the amount of gst after, but the gst included? Penny Nom lui répond. 





Percentage difference in pipe volumes 
20090222 

mike pose la question : what is the % difference between a 3 inch diameter pipe compared to a 4 inch diameter pipe? and how do i find the answer? Penny Nom lui répond. 





Averaging percentages 
20090221 

Chris pose la question : Ok I'll give you a simple example of what I'm doing. Lets say that on one forum, a memebr has made 52 posts out of the 412 posts made altogether. Then on another forum, the same person has made 10 posts out of the 60 posts altogether. What percentage of the posts has this person made in these 2 fourms combined. Robert Dawson and Harley Weston lui répond. 





A dinner party 
20090218 

will pose la question : You are serving 3 different entrees at a party. If 100 guests are having beef, 175 guests are having pasta, and 45 percent of the guests are having chicken how many guests are expected at this party? Penny Nom lui répond. 





Rent and a commission 
20090217 

cliff pose la question : a landlord receives $95.00 rent 5% commission was paid to get to $95.00 what was the original number. The answer is obvious but what is the formula. Thanks. Cliff Penny Nom lui répond. 





Can you convert numbers with units to percents? 
20090212 

Kenneth pose la question : To change a number to a percent, move the decimal two places to the right and add a percent sign.
For example, 0.35875 = 35.875%.
If the number has a dollar sign or some other kind of unit, for example, pounds, feet, etc. how is the number converted to a percentage.
For example, change $0.35875 and 0.75 lbs. to a percentage. How is this done. I have never seen $35.875% or 75 lbs.% before. Robert Dawson and Harley Weston lui répond. 





What percent is 314.70 of 693.20? 
20090211 

steph pose la question : what percent is 314.70 of 693.20 Penny Nom lui répond. 





A goat in a square paddock 
20090210 

lachlan pose la question : A farmer uses a rope to tether a goat to a pole at the corner of a square paddock. The length of one side of the square is 24m.
a) If the length of the rope is 12m,what % of the paddock can the goat reach? is the answer 19.62 %?
b) If the farmer wants the goat to be able to graze exactly half the area of the paddock, what length must the rope be? Penny Nom lui répond. 





Cubic centimeters and ounces 
20090206 

Dawn pose la question : 1 syringe contains 5.5cc of medicine & cost $13.50
1 2 oz bottle of medicine cost $17.50
How many cc's in 2 oz, & which is the better deal? Stephen La Rocque lui répond. 





How much did the statue originally cost him? 
20090206 

Debra pose la question : Jim is able to sell a handcarved statue for $670 which was a 35% profit over his cost. How much ded he statue originally cost him? Penny Nom lui répond. 





A company fish fry 
20090204 

shaelisa pose la question : At a company fish fry, ½ in attendance are employees. Employees’ spouses are 1/3 of the attendance. What is the percentage of the people in attendance who are not employees or employee spouses? Robert Dawson lui répond. 





Calculating markup 
20090203 

Tonya pose la question : I'm trying to figure out the formula for the following, I have a product that I want to receive a certain profit, but with this product I also have to pay a percentage of commission to someone. I need to know how to calculate my new selling price taking into account the markup percentage, but I don't want my cut to be lowered. I have calculated the markup percentage to get my new selling price with the commission, but it lowers my cut once I pay the commission and I don't want it to do that. Thanks Penny Nom lui répond. 





What do I need to pass the course? 
20090202 

Lynnette pose la question : If I received 100% on my assignment which is worth 20% of my total mark and 87% on my midterm which is worth 40% of my total mark what would I need to get on the final exam which is worth 40% of my mark. To pass the course I must have 80% or above. Thanks. Penny Nom lui répond. 





Calculate the GST paid from the total 
20090122 

Claude pose la question : I need to know the GST I paid for irems bought. What is the simple formula to calculate the GST paid from the total. Some merchants do not clearly indicate the amount of GST on their sale receipt. Harley Weston lui répond. 





PST and GST 
20090120 

janet pose la question : Hello
I need to figure what one would pay pst 8% gst 5% on a total of $1700.00
I have a small business some pay with cash I need to calculate the taxes in reverse Can you help with formula that the government might like
Thank you
Janet Harley Weston lui répond. 





Percentage increase 
20090119 

Destiny pose la question : In 1990 there were 25 springs in the park. This year there are 35 springs
in the park. What is the percent increase? Penny lui répond. 





Two methods of payment 
20090113 

adjoa pose la question : owen was offered $225.00per week plus 3%on sales, or 15%of sales with no salary. How much must he sell before the second method of payment gives him the highest pay? Express your answer to the nearest dollar. Penny Nom lui répond. 





A 10% salt solution 
20090112 

Joanna pose la question : How many liters of water must evaporate from 40 liters of a 10% salt solution to make a 25% salt solution? Robert Dawson and Penny Nom lui répond. 





Numbers or Percentage or probability or what? 
20090107 

Chew pose la question : Teacher A teaches 50 students and 45 of them obtained straight As.
Teacher B teaches 5 students and 5 of them obtained straight As.
Which teacher would you send you child to and why? Robert Dawson and Harley Weston lui répond. 





30% profit 
20090106 

bob pose la question : this is a basic question that I just can't get thru my head.
I know all my cost for a product, if I want to sell at a given profit can I divide by a given
number, example for 30 % divide by .7 or do I multiply?
Is there a simple answer for this? Sure would make my work a lot easier.
Thank you for your time
Puzzled in Ohio Penny Nom lui répond. 





Annual percent growth 
20081213 

Joe pose la question : If WallMart had sales of $58,200,000,000 in the year 2002 and $90,800,000,000 in the year 2006.
1. Find what percent that increase is of the 2002 sales? I came up with (9.08*10^10  5.82*10^10) / 5.82*10^10 * 100 = 56.01% increase. Is this correct?
2. What was the percent GROWTH in WalMart's sales from 20022006? I am having trouble figuring out how to do the Growth problem. I would appreciate any help. Harley Weston lui répond. 





The centroid and circumcircle of a triangle 
20081209 

prateet pose la question : in an equilateral triangle prove that the centroid and centre of the circumcircle coincide
here i am not clear about the concept of centroid and circumcircle
i cant understand how AGis 2/3 AD.
please help in details about the topic mentioned. Harley Weston lui répond. 





Solution Concentration 
20081206 

Manjola pose la question : I mixed 100 ml of 28% Ammonium nitrate, with 100 mL of 68% nitric acid. What is the concentration of the resulting solution?
Thank you Janice Cotcher lui répond. 





A markup of 30% 
20081206 

Tammy pose la question : How can a markup of 30% be calculated by using 1.43 times the original cost? Where does the 1.43 come from? For example: the original cost is 830.00 the markup is 30 %. The selling cost is 1186.90. My boss uses 1.43 to figure the mark up for 30% and 1.23 for 25% and 1.1 for 10%. What I want to know is how do they come up with these figures? Stephen La Rocque lui répond. 





What is the pre GST price? 
20081205 

Chris pose la question : I've been looking at a few answers to the question of before and after GST price calculation.
the suggestion have been :: multiply the pre GST price by 1.10 to get the
price and reverse to get a pre GST price.
But how do you calculate the pre GST price from an existing retail price?
For example if you take an item that is $150.00 and multiply it by 0.10
you get $15.00 as the GST add on. Apparently giving you $135.00 as the
pre GST price. However if you then multiply $135.00 by 1.10 you get the
$148.50 as the total.
So the question is how does one calculate the real pre GST price from
an existing retail price?
Regards,
Chris Penny lui répond. 





40lbs is what % of 75lbs? 
20081129 

Kieara pose la question : 40lbs is what % of 75lbs? Penny lui répond. 





A weighted average 
20081127 

Kenneth pose la question : I am interested in determining the answers to the following question by using some type of weighted average:
An investor has $30,000 to invest at simple interest in two accounts. One account earns 2% and the second earns 5%. How much must he invest in each account if his total return is 4% or $1,200? Penny lui répond. 





What % of his salary does he save? 
20081124 

Tarique pose la question : John earns 15000 every month. He spends Rs. 8900 .What % of his salary does he save? Penny Nom lui répond. 





Profit as a percentage 
20081121 

Nomar pose la question : Cost Price is $ 556,109.64 and Selling price is $ 1,020,936.00, What is the Profit Percentage? Harley Weston lui répond. 





The volume is decreased by 25% 
20081117 

Wanda pose la question : If the volume of a sphere is decreased by 25%, what is the new equation? Penny Nom lui répond. 





A group of people 
20081115 

Michael pose la question : In a group of people,
if 20% of the people are 1834 years of age, and 30% of the people
are 2554 years of age.
What are the percentages of people 1824,2534,3554 and other?
Thank you  Mike Chris Fisher lui répond. 





20% of 8 million 
20081031 

joe pose la question : what is 20% of 8million Penny Nom lui répond. 





Markup 
20081021 

lisa pose la question : A television cost Best Buy 400.00. They want to sell it at a price of 1500.00. What would the percent markup have to be for this to happen. Penny Nom lui répond. 





I borrowed 2000.00 at a rate of 7% for 1 year 
20081020 

carolita pose la question : if i borrowed 2000.00 at a rate of 7% for 1 year what would be the interest Penny Nom lui répond. 





100,000 + 20% 
20081016 

Andrew pose la question : I have a question what 100000 + 20% = Penny Nom lui répond. 





What percentage is 33333 of 22222? 
20081016 

b pose la question : How do I find the percentage of 2 numbers?
What percentage is 33333 of 22222? How do I find the answer. Penny Nom lui répond. 





Percentage of an hour 
20081015 

JESSICA pose la question : HI I AM IN GRADE 7 AND FOR MATH HOMEWORK MY TEACHER ASKED US
TO MAKE 8 DIFFERENT TIMES(clocks) AND TELL HIM WHAT THE PERCENTAGE
FOR THE TIME IS.
BUT I DON'T KNOW HOW TO CONVERT TIME TO A PERCENT.
PLEASE HELP ME??!!??
JESSICA
SEVENTH GRADE Penny Nom lui répond. 





A 10% increase in supply 
20081010 

Irena pose la question : How do you find begining inventory if after 10% increase in supply you got 27.5 units Penny Nom lui répond. 





A double discount 
20081006 

Joanna pose la question : An instrument store gives a 10% discount to all students off the original cost of an instrument. During a back to school sale an additional 15% is taken off the discounted price. Julie, a student at the local high school, purchases a flute for $306. How much did it originally cost? Penny Nom lui répond. 





Cost before and after the GST 
20081001 

bruce pose la question : Hi, i seem confused on this topic:
If i need to add say 10% GST to a cost then i would times it by 1.1.
If i need to reduce the cost by 10% then i need to divide it by 1.1. that is all well and good.
What if i need to add 12%, 18% or 20% what is the formula then? Penny Nom lui répond. 





Increase pricing by 5% 
20080928 

Adrian pose la question : I am working to increase pricing by 5%. If the price is 100, I would typically use the formulas 100 * 1.05 = 105, which is a $5 increase. An associate suggests I divide to get the desired increase. For example, using $100 with a 5 percent increase. I would use the forumula 100/.95 = 105.26. Thas is a 5.26 increase. Can you explain this method to me an why the different increases? Which one is correct. Penny Nom lui répond. 





144 square inches 
20080927 

mike pose la question : how much cm is in 144 square inches? Penny Nom lui répond. 





Sample variance: inches to centimeters 
20080922 

Anita pose la question : The average height of a sample of basketball players is 6 feet, 2 inches or 74 inches.
The standard deviation of this sample of players is 4 inches. If each person's height were to be multiplied by 2.54, what would be the value of the resulting sample variance? Harley Weston lui répond. 





Markup as a percentage 
20080920 

itzie pose la question : Okay, I've tried to make sense from some of the other questions and
answers but I still don't see the answer that makes sense to me so here goes:
I need an explanation on how $15.00 / .6 = $25 is a 40% and not as one
would see it as a 60% mark up??? I don't get it. Penny Nom lui répond. 





A 5% raise each year for 20 years 
20080913 

marie pose la question : In his first year, a math teacher earned 32,000. Each successive year, he earned a 5% raise. How much did he earn in his 20th year? What were his total earnings over the 20year period Stephen La Rocque lui répond. 





A price reduction and a discount 
20080911 

Rita pose la question : A store advertises that during its Labor Day sale $15 will be deducted from every purchase over $100. In addition, after the deduction is taken, the store offers an earlybird discount of 20% to any person who makes a purchase before 10 a.m. If Hakeem makes a purchase of x dollars,
x > 100, at 8 a.m., what, in terms of x, is the cost of Hakeem's purchase?
(1) 0.20x  15 (3) 0.85x  20
(2) 0.20x 3 (4) 0.80x  12 Penny Nom lui répond. 





The percentage of sand in a soil mixture 
20080905 

kristi pose la question : 2 m 3 of soil containing 35% sand was mixed
into 6 m 4 of soil containing 15% sand. What
is the sand content of the mixture? Penny Nom lui répond. 





A discount as a percentage 
20080905 

joeann pose la question : if a product sold for $40.00 and you got a $10.00 discount what percentage discount do you recieve? Penny Nom lui répond. 





Tara's game show winnings 
20080902 

David pose la question : Tara paid onehalf of her gameshow winnings to the government for taxes. She invested onethird of her winning in Jeff's copy shop at 14% interest and onesixth of her winnings in Kaiser's German Bakery at 12% interest. If she earned a total of $4000 on the investments in on year, then how much did she win on the game show? Penny Nom lui répond. 





The saddle height on a bicycle 
20080831 

David pose la question : The saddle height on a bicycle should be 109% of the inside leg measurement of the rider (http://www.harriscyclery.com). If the saddle height is 37 in., then what is the inside leg measurement?
I don't know how to set up the equation if you can teach me how to set it up it would be great thanks Harley Weston lui répond. 





GST and PST 
20080825 

Monique pose la question : okay i live in ontario and i want to find out what my grand total will be so
i know how much i will have to pay...
so if i have a before tax total of $48.40... what will my grand total be? with
GST and PST i know that GST=5% and PST=8% Penny Nom lui répond. 





Converting centimetres to metres 
20080821 

walter pose la question : how do you convert the smaller unit to a decimal of the larger unit and then solve
17 m  130 cm Penny Nom lui répond. 





Eccentricity of an Elliptical Orbit 
20080820 

Gina pose la question : A satellite has an elliptical orbit around the earth with one focus at the earth’s
center, E. The earth’s radius is 4,000 miles. The highest point that the satellite is
from the surface of the earth is 800 miles, and the lowest is 200 miles.
What is the eccentricity of the satellite’s orbit? Janice Cotcher lui répond. 





A 3% increase 
20080818 

RENEE pose la question : I need to know how to do a 3 percent increase for $118,200......x's it by 3% will not work please answer fast Penny Nom lui répond. 





Percent difference 
20080812 

mike pose la question : What is the percent difference between two homes if one is worth $525,000
and the other is $425,000. (525,000  425,000 = 100,000) Penny Nom lui répond. 





What is the account value after 3 years? 
20080710 

Carlos pose la question : Question
Suppose that you deposited $3,000 at the beginning of each year for three years in a savings account earning 4%. What is the account value after 3 years (approx)?
a. 9,120
b. 9,211
c. 9,739
d. 9,989 Penny Nom lui répond. 





Profit as a percentage 
20080708 

ANNORIS pose la question : Question from annoris, a student:
How to calculate percent of profits using step by step division formula.
I know how to get the profit.
Selling cost was $15.00
Cost amount was $10.00
Total profits its $ 5.00.
But i do not know how to get the percent because i dont know how to divide to well . Can you helppppppp me ? Penny Nom lui répond. 





A net profit of 4% on a sales volume of $100 million 
20080707 

Muriel pose la question : If a firm has a net profit of 4% on a sales volume of $100 million and the
company has instituted logistics programs that result in cost savings of
$1 million, what equivalent sales increase would be required to equal such
a cost savings?
What I do know is that the net profit % has increased from 4% to 5% and
the profit has gone from $4,000,000 to $5,000,000 but I have no idea what
the formula is to figure out how much sales would have to increase to
result in that same profit. Janice Cotcher lui répond. 





Cubic centimeters and milliliters 
20080707 

Robert pose la question : how many milliliters are in 750 cubic centimeters? Harley Weston lui répond. 





GST and PST 
20080702 

Sharon pose la question : The question was asked before but it was based on a G.S.T of 7% and I am now interested in the answer for 5% G.S.T.
It usually comes up when I husband bring homes a gas bill that doesn't break down the gst and pst, but rather just gives him the total cost I have to know how much GST he paid. If it is Diesel the PST isn't included but if it is regular gas he pays both. PST is 7%. Penny Nom lui répond. 





Percentage increase 
20080629 

Paul pose la question : Could you please help me with this question. I was paying $98.00 a month for my health insurance premium, now it is up to $125.83 How much of an increase is that as a percentage increase, and how can I do this on a calculator. I'd like to know how much my increase is as a percentage. Penny Nom lui répond. 





30% profit 
20080619 

Julie pose la question : how do i calculate the price per person that will return a 30% profit on the sales revenue generated? Penny Nom lui répond. 





A 15% discount 
20080618 

karonn pose la question : Muthu bought the following items from a furniture shop which offers trade discounts of 15% on its furniture.
Item 
list price 
office chair 
RM 250 
office table 
RM 1400 
book shelf 
RM 3500 
(a) find the net price of each item.
(b) find the total payment if Muthu bought 3 office chairs, 2 office tables and a book shelf. Penny Nom lui répond. 





A space camera circles the Earth 
20080616 

Rita pose la question : A space camera circles the Earth at a height of h miles above the surface. Suppose that d distance, IN MILES, on the surface of the Earth can be seen from the camera.
(a) Find an equation that relates the central angle theta to the height h.
(b) Find an equation that relates the observable distance d and theta.
(c) Find an equation that relates d and h.
(d) If d is to be 3500 miles, how high must the camera orbit above Earth?
(e) If the camera orbits at a height of 400 miles, what distance d on the surface can be seen? Penny Nom lui répond. 





Price discounts 
20080614 

karonn pose la question : Kinky Trading sells an items for RM90 less 25% and 10%. Softee Trading sells the same item for RM100 less 30%.
(a) find the net price of the item for the two companies.
(b) what additional discount percent must be offered by the company that sells at higher net price in order to meet the competitor's price? Penny Nom lui répond. 





Percent difference? 
20080614 

Cathy pose la question : I am trying to verify a "percent of difference" as stated on a tax form. I cannot seem to come up with the equation to do so.
Here are a few examples on the form:
Last year $62.91 this year $66.05 tax difference $3.14 percent difference 5.64%
Last year $ 2014.97 this year $1982.93 tax difference $32.04 percent difference 57.56%
Last year $97.66 this year $79.58 tax difference $18.08 percent difference 32.48%
I have tried several different ways and per some of Q&A's already on your site I still have a problem and would appreciate some assistance.
ThanksCathy Penny Nom lui répond. 





Percent improvement 
20080612 

JOHN pose la question : IF YOU HAD A RATE OF 678/HOUR AND YOUR NEW RATE/HOUR
IS NOW 1961 WHAT IS PERCENT OF IMPROVEMENT Penny Nom lui répond. 





Rate reduction 
20080611 

Brian pose la question : we had a 2.43% scrap rate last year, compared to a 1.28% this year. does this come out to a .47% improvement?
Thanks for your help Harley Weston lui répond. 





What is 6 over 8 as a percentage? 
20080611 

stephen pose la question : what is 6 over 8 as a percentage? Penny Nom lui répond. 





90% of gross leaseable footage 
20080607 

Rosalind pose la question : 90% of gross leaseable footage in the shopping center, being 394,577, excluding that square footage leased by major anchor tenants, being 284,747. Would you deduct the 284,747 from the 394,577, then multiply by the 90%. Or would you multiply the 394,577 by the 90%, then deduct the 284,747? Penny Nom lui répond. 





Calculating a price based on markup 
20080603 

Sheldon pose la question : I know the most common form for retail businesses of calculating a price based on markup is:
Cost/(1  Markup), but how is this supposed to work for a business that desires a markup of over 100%. Harley Weston lui répond. 





$16000 at 7% per annum for six months 
20080521 

Delbert pose la question : If my principal balance if $16000.00 and I paid 7% interest per annum but only kept the loan for 6 months How much interest would I owe after 6 months. Harley Weston lui répond. 





Percentage difference 
20080520 

Cavell pose la question : Hi, the projected cost was 71,700. The actual cost was 56,876. What is the percent difference? Penny Nom lui répond. 





The wedges in a circle graph 
20080518 

Libby pose la question : I don't understand how to do this word problem:
The cafeteria workers distributed a survey to the student body asking students to pick 1 from a list of 5 choices for their favorite lunch. The circle graph below gives the results of the survey for the students who responded. What is the measure, in degrees, of the central angle for each choice?
And there is a pie chart that has food choices with these percentages: 25%, 20%, 15%, 10%, and 30% Leeanne Boehm and Penny Nom lui répond. 





Percentage difference 
20080514 

sam pose la question : if you move 3,626 packages in 2008 and moved 3,202 in 2007 what percet difference do you have from 2008/2007. Penny Nom lui répond. 





Selling price 
20080510 

Roxane pose la question : I'm trying to figure out the formula for the following, I have a product that
I want to receive a certain profit margin, but with this product I also have
to pay a percentage of commission to someone. I need to know how to
calculate my new selling price taking into account the markup percentage, but
I don't want my gross margin to be lowered. I have calculated the markup
percentage to get my new selling price with the commission, but it lowers
my profit margin once I pay the commission and I don't want it to do that. Penny Nom lui répond. 





Markup 
20080502 

Sussie pose la question : I sold an item for $75.00
It cost me $17.00
How do I calculate to come up with the Markup %? Penny Nom lui répond. 





5 percent 
20080426 

Lok pose la question : I do not understand why 1.05 = 5%, how can I get this?
In additional, if I want to calculate 10 x 5% in excel, what is the formula? Penny Nom lui répond. 





What percent of the 35 graduates took the exam? 
20080425 

Laura pose la question : I have 35 graduates. All but 2 took their board exam. What percent of the 35 graduates took the exam? Stephen La Rocque lui répond. 





What is the % of the resulting solution? 
20080420 

RON pose la question : USING 4 PARTS OF 80% SOLN AND 1 PART OF 20% SOLN, WHAT
IS THE % OF THE RESULTING SOLN? FOR 120ML USE 96 ML OF
THE 80% SOLN AND 24 ML OF THE 20% SOLN BUT WHAT IS
THE % OF THE RESULTING SOLN? PLEASE SEND HOW TO
CALCULATE THE %. IS THE ANSWER 68% ?? Penny Nom lui répond. 





Chord, radius, arc length and central angle 
20080415 

Cindy pose la question : There is a railroad curve with a chord length of 2000 ft. and a central angle of 35 degrees. What is the radius and arc length of the circular arc? Stephen La Rocque lui répond. 





What is 300% as a fraction? 
20080414 

Carli pose la question : what is 300% as a fraction Stephen La Rocque lui répond. 





What is the easiest way to remember how to do percents? 
20080409 

Amy pose la question : what is the easiest way to remember how to do percents? Stephen La Rocque lui répond. 





2500mL of Phosphoric acid 
20080409 

Trina pose la question : If I have 2500mL of Phosphoric acid that has a fluoride concentration of 0.91% and need to increase it to 1.40% how much 49% HF do I need to add? Harley Weston lui répond. 





5% tax on $1,500.00 
20080326 

Kay pose la question : If a sales tax is 5% on $1.500.00 car. What would be the total? Penny Nom lui répond. 





The centre and radius of a circle 
20080312 

Ryan pose la question : hello and thank you for such a wonderful service.
This problem I think needs to be checked could you take a gander at it and tell me if i get it correct thanks
find the center and the radius of this circle x^2+y^2=8x2y+15=0
I cam up with center 2, 1/2 and a radius of 11 3/4 Harley Weston lui répond. 





Percent and range 
20080306 

Greg pose la question : How do you find out the percent of a number that is with in a range of numbers (i.e. what % is 39 of range 34 to 42)? Penny Nom lui répond. 





The profit was what percent of the cost? 
20080229 

sierra pose la question : The profit was what percent of the cost?
Here is some more of that whole problem.
Selling Price$26.60
Discount$6.65
Sale Price after the Discount$19.95
The Profit$5.95 Penny Nom lui répond. 





150 decimeters is how many centimeters 
20080229 

gayle pose la question : 150 decimeters is how many centimeters Penny Nom lui répond. 





GST and PST 
20080228 

Donna pose la question : If I have a total amount and would like to know the amount of GST paid (5%) and I would have also paid PST (7%) in the total, can you give me a number to multiply by to get the answer Penny Nom lui répond. 





A percentage problem 
20080226 

Suzanne pose la question : In a class of 40 students, 80% are business majors. Of the 24 students
who passed the midterm examination, 75% are business majors. What
percentage of students in the class who are not business majors passed
the examination? Penny Nom and Claude Tardif lui répond. 





A triangle and its incenter 
20080211 

Elle pose la question : In the figure, P is the incenter of triangle ABC, the radius of the inscribed circle is 6cm, and the perimeter of triange ABC is 38cm. What is the area of triangle ABC? Penny Nom lui répond. 





How much tax does Zoe have to pay? 
20080211 

Kelly pose la question : Rahsad pays $6.30 tax for a pair of shoes that is priced at $45.
His friend Zoe purchases another pair of shoes on sale for $25 in the same store.
How much tax does Zoe have to pay?
Solve the problem in two ways. Show your work.
What assumptions did you make? Penny Nom lui répond. 





What percent profit is this? 
20080207 

Vanessa pose la question : Mrs Henderson buys a chair for $215.00 and later sell the chair for $336.00 what percent
profit is this? Penny Nom lui répond. 





The cost before tax and shipping 
20080206 

jonathan pose la question : Please explain how to solve this problem. I know you have to work backwards. If i have $125 to spend, how do I know the most I can spend before adding 6% tax and 9% shipping.(shipping is cost before tax) I can only figure this out by trial and error. I know there is a better way Penny Nom lui répond. 





The radius of a circular arc 
20080204 

Bill pose la question : Hi,the Central Angle of a sector of a circle is 40 degrees. The circular arc of the curve has a chord length of 3000 ft. Find the radius(r) of the circular arc. Penny Nom lui répond. 





More than 100% 
20080204 

francisco pose la question : when changing from a percent to a decimal,how can you tell when the decimal will be greater than 1? Penny Nom lui répond. 





Total profit 
20080203 

Rhonda pose la question : I help to manage a concession stand. We sell a variety of items. Some have a profit of 60%, some 80%, etc. We have done nothing scientific to choose our prices. We just try to stay in the ballpark of schools around us. Our administrator wants to pay those that run the concession stand a percent of what is in the cash box after startup money is taken out. We have some gathered some data (not much) on how many of each item we sell and can certainly calculate percent profit. Is the profit for the entire concession stand a weighed average? I'm thinking (% profit on candy)(number candy sold) + (percent profit nachos)(number nachos sold) + (percent profit pop)(number pop sold), etc. Will this work? Does the AMOUNT of profit for these different items need to be figuredin? Hmmm. . . Victoria West and Harley Weston lui répond. 





The 5% GST 
20080202 

Nathalie pose la question : The GST is now 5% I have a new amount $587.43 what is the formula to calculate the GST. On the $587.43 Penny Nom lui répond. 





Percentage savings 
20080201 

Donna pose la question : What is the percentage of savings if I bought an item for $98.60 that was $152.23 and something for $96.48 that was $136.65? Penny Nom lui répond. 





Percentage off 
20080129 

Donna pose la question : What is the percentage of savings if you bought something for $34.00 that was originally priced at $37.60. Stephen La Rocque lui répond. 





How do I convert mcg to ml? 
20080127 

David pose la question : How do I convert mcg to ml? Stephen La Rocque lui répond. 





Percentage of what? 
20080123 

Jenny pose la question : What is the difference in percentage between 31990 and 29990? Stephen La Rocque lui répond. 





Percentage and units 
20080115 

Kenneth pose la question : Hello:
If the sales tax on merchandise sold in stores is 6%. The item is
multiplied by the sales tax of 6%. For example, the sales tax on
pencils worth $1.00 is 6% X $1.00 is $0.06 or 6 cents plus $1.00 for
a total of $1.06.
1. If the tax is 6%/$1.00, why doesn't the dollar sign as a unit cancel
after the multiplication?
Isn't it 6%/$1.00 X $1.00 or whatever the dollar amount is?
The dollar signs should cancel, but they do not.
2. If percentages are unitless, is there a reason? Harley Weston lui répond. 





What do I need on the exam to get an average of 75%? 
20080115 

Alyssa pose la question : Hi there,
I was wondering how i could calculate the mark i need on my upcoming exam in order to increase my final grade. If i currently have a 65% in a class and my final exam is worth 20% what would i need to get on my exam to increase at least 10%
thanks :) Penny Nom lui répond. 





Average Yearly Percentage Change 
20080110 

Ray pose la question : It's about average test scores over a three year span. If the scores were:
2005 52.6%
2006 42.5%
2007 45.5%
What is the average amount they changed each year in three years? Stephen La Rocque and Harley Weston lui répond. 





Base salary plus commission 
20080110 

mike pose la question : i need some help with this word problem.
in november 2001, hall kinion advertised an account executive position in savannah
georgia for a salesperson with experience selling internet services. the job
advertised a 3500 dollar base salary and 24000 dollar to 48000 dollar in
commissions in the first year. Assuming a 20 percent commission rate, how many
dollars in sales would u have to generate to earn 64000 dollars annually. Penny Nom lui répond. 





The 5% GST 
20080103 

Kim pose la question : If I have spent $1700 what portion is GST now that the rate has dropped to 5%? Stephen La Rocque lui répond. 





Percentage of an acre 
20080103 

Christine pose la question : Given that an acre is 43,560 sq/ft; If a piece of property is 19,506 sq/ft, What percentage of an acre is it? Stephen La Rocque lui répond. 





The centroid of a polygon 
20071229 

David pose la question : I am playing around with an idea. I've read previous answers to questions
(using surveyor calculation methods) related to finding the area of an irregular
shape parcel of land (or irregular polygon). Is there a formula or method for
calculating the centroid (midpoint) for this type of polygon. I've seen plenty
of methods for calculating the midpoint for a triangle or regular shape poloygon
but few for an irregular shape polygon such as a parcel of land. Thanks... Harley Weston lui répond. 





Percentage change 
20071219 

Aaron pose la question : I understand how figure percent of change and I can figure it on a calculator but if I have to do it without I'm not sure how to divide when the original amount is larger than the amount of change. For example, the decreased amount is 5.00 on 29.99, what would the percent be. Like I said I can do it on a calculator but need to know how to figure it without one. Penny Nom lui répond. 





Circumcentre of a triangle 
20071218 

Kathryn pose la question : Find the coordinates of the circumcentre of the triangle whose vertices are:
(5, 3), (3, 1), (1, 5) Stephen La Rocque lui répond. 





Profit percentage (markup and margin) 
20071218 

Laura pose la question : If my husband says he sold $11,000 worth of tools and made $1400 on the deal, what is the percent of profit? Stephen La Rocque lui répond. 





A T.V. is offered at a sale price of £460 
20071212 

Conor pose la question : I was wondering if you could help me
with this question which I have for homework.
a) A T.V. is offered at a sale price of £460.
If the reduction was 8%, what was the original price of the T.V.? Penny Nom lui répond. 





Percentage increase in profit 
20071204 

Dee pose la question : If I had a certain % increase in profits for the entire year, why can't I add the profits I made for the first 1/2 of the year to the profit I made in the second 1/2 of the year to get the total year end profit percentage? Or how can I compare the increase/decrease for each 1/2 of the year to the total % increase/decrease? Penny Nom lui répond. 





Percent change between two value ranges 
20071128 

Joe pose la question : How do you calculate a percent change between tow value ranges  for instance if I project a range for 2007 to be between 100 and 120 and a range for 2008 to be between 120 and 140, how do I calculate the estimated increase between the range? Is it 0% to 40% (taking the two inside values rto calculate the minimum and the two outside values rto calculate the maximum?) Harley Weston lui répond. 





Find the centroid 
20071126 

josh pose la question : vertices X(2,6) Y(4,10) Z(14,6) find the coordinates of the centroid Stephen La Rocque lui répond. 





A percent as a fraction 
20071124 

Abby pose la question : write 43.75% as a fraction or mixed number in lowest terms. Penny Nom lui répond. 





20 gallons of concentrate 
20071120 

Ken pose la question : What is the formula I need to use?
I have 20 gallons of concentrate. I am mixing it at 0.5%.
How many total gallons of solution will I end up with?
I came up with 4000 gallons of solution  but not using the easiest of methods. Penny Nom lui répond. 





A 15% discount 
20071117 

Deanna pose la question : if I purchase an item for $450.00 but get a discount 15% of my item what would then be my total syeve La Rocque and Penny Nom lui répond. 





How many centimeters equal one meter? 
20071115 

Sherrie pose la question : How many centimeters equal one meter? Penny Nom lui répond. 





Our company charges a 4% margin 
20071113 

Nadja pose la question : Our company charges a 4% margin on top of a pay rate to obtain the total charge rate. A
client is denying that the total charge rate is calculated in the following
way:
Pay rate/0.96 = Charge rate
Please could you provide me with an explanation which I can pass on as
to why it is calculated in this way? Penny Nom lui répond. 





A 10% markup then a 10% discount 
20071113 

svetik pose la question : The best selling dessert at Chez Russell earns revenue of $5000 per week. During Restaurant Week, they are required to give a 10% discount on this dessert. Because the owner is a crook, he decides to mark up the price the week before Restaurant Week and then give the 10% discount off the marked up price. During the marked up week, they still sold the same amount of pieces as any prior week. However, they expect to sell 100 more pieces during restaurant week. If the revenue from this dessert is the same for the marked up week and restaurant week, what is the normal price of the dessert, rounded to the nearest cent? Penny Nom lui répond. 





How do i convert milliliters to grams for water and also for copper sulfate (CuSO4)? 
20071111 

jenn pose la question : how do i convert milliliters to grams for
water and also for copper sulfate (CuSO4)? Harley Weston lui répond. 





Cubic centimeters to cubic yards 
20071110 

Logan pose la question : if i have 188.4cm^3 of concrete how do i change it into cubic yards? Penny Nom lui répond. 





Constructing the centre of a circle 
20071106 

Carolyn pose la question : I have a line segment AB. I need to divide a segment into 3 parts that are congruent. Please help how to divide it. The answer that I was given previous was not the way the teacher wanted it.
I also need information on how to find the center of a circle given an arc. Penny Nom lui répond. 





Percentage 
20071105 

K. pose la question : I am trying to figure out the percent a student has accomplished some goals. My mind is drawing a complete blank...can you help!
Here are the figures I'm looking at making into a percentage:
Goal #1: yes=136, no=8
Goal #3: yes=131, no=13 Penny Nom lui répond. 





A tshirt is on sell at 33 1/3% off 
20071031 

kbennett pose la question : A tshirt is on sell at 33 1/3% off. Joey paid $12 for his shirt. What was the original price? Penny Nom lui répond. 





Percentages to put on top of an items cost 
20071015 

GAIL pose la question : what is the formula for calculating percentages to put on top of an items cost.
ie: 115.60 with 15% on top Penny Nom lui répond. 





What is the total population? 
20071015 

Tomco pose la question : 7/10 of the population believed 175,104,000 to be true  what is the total population.
We keep coming up with about 227,000,000 by just adding 30% to 175. Why doesn't that
work?
We have since figured out the answer to be 250...but why? Steve La Rocque and Harley Weston lui répond. 





How much can Daisy spend? 
20071014 

Math pose la question : Daisy has $25.00 to spend on dinner. Her sister tells her to leave 18% of the bill as a tip and
the sales tax is 8% of the bill. What is the maximum amount she can spend on dinner in order to cover
the meal, sales tax, and the tip? Penny Nom lui répond. 





The percentage difference between 1/20 to 1/15 
20071011 

jake pose la question : what is the percentage difference between 1/20 to 1/15.... Stephen La Rocque lui répond. 





The aggregate percentage for the year 
20071011 

Lisa pose la question : I would like to add up twelve percentages then divide it by 12 to get the aggregate percentage for the year. How do I accomplish this task? Thanks. Penny Nom lui répond. 





calculating percentages for my class 
20071009 

Cori pose la question : I teach a class in which there are seven projects/quizzes worth 10% each,
and the midterm and the final are each worth 15%. No problem figuring out
their final grade, but I have to give a midterm average, having only FOUR
of the seven 10% things, and the midterm test. The closest I've come to
an accurate "average" is to just add them together (as equals) and average them. Victoria West & Harley Weston lui répond. 





Doubling every day 
20071007 

Jerrie pose la question : Patti saved pennies for 10 days. The first day she saved 1 cent. Every day after that she saved twice as much as the day before. How much money did Patti save altogether? Stephen La Rocque lui répond. 





Arc lengths, central angles and radii 
20071004 

Ashutosh pose la question : Jose can remember that the length of an arc is 440cm, but he cannot remember the radius of the arc or the angle at the center. He does know that the angle was a whole number of degrees and the radius was less than 100cm. Find three possible angles and write down the size of each of the possible radii. Stephen La Rocque lui répond. 





Rolling a die repeatedly (you can't just add percentages) 
20071004 

Howard pose la question : If my son has a 16.66% chance of rolling a particular number on a dice,
and he rolls for it 6 times, he knows (from experience) that his
odds of getting at least 1 right are not 100% (16.66% +16.66%+16.66% etc).
He asked me if there was an equation that would give him the correct
percentage chance of success when trying X times for a Y% chance
of something. Victoria West lui répond. 





Percentage 
20070930 

carolyn pose la question : What percentage is 1 million dollars to 6,450 million dollars Penny Nom lui répond. 





Finding the center of a circle that goes through three given points 
20070916 

Gary pose la question : I am given three points represented by their Latitude and Longitude. How do I determine the Latitude and Longitude of the center of a circle through the three given points?
The lat/lon of the three points are:
A. N 43 degrees 30.251 min. W 96 degrees 45.695 min.
B. N 43 degrees 30.006 min. W 96 degrees 45.082 min.
C. N 43 degrees 30.719 min. W 96 degrees 45.410 min.
Thanks. Stephen La Rocque lui répond. 





$19.54 is 20 % of ????? 
20070914 

aryanna pose la question : i need to find out how to find percentage on a calculator ?? the equation is
$19.54,, is 20 % off????? Penny Nom lui répond. 





Percentage differences 
20070829 

Camilla pose la question : If a store sells a certain syle of skirt, an in the first week they sell 13,
in the second week 20, in the third week 17 and in the fourth week 23, calculate the percentage
difference between the highest and the lowest weekly sale. Stephen La Rocque and Harley Weston lui répond. 





Fractions, ratios and percentages all mixed together 
20070829 

Charon pose la question : Example: x : 1/4% :: 9 3/5 : 1/200 Stephen La Rocque lui répond. 





More on a percentage question 
20070823 

Dee pose la question : In a previous question, you answered:
"What percentage of $34.51 is $10.71?
I translate this English statement into a mathematical statement (equation) using the following
"what" is the unknown, call it x
"percent" is peronehundred, that is over 100
"of" is multiplication
"is" is the verb, which in an equation is the equal sign
Thus the English statement above becomes
x/100 $34.51 = $10.71
Solving for x yields
x = 31.03
Hence the gross profit is 31% of your selling price."
How did you solve for 'x' Penny Nom lui répond. 





Percentage difference between a microcentury and 50 minutes 
20070821 

Wonder pose la question : A lecture period (50 min) is close to 1 microcentury.
Find the percentage difference from the approximation? Stephen La Rocque lui répond. 





Percentage change 
20070821 

Saleena pose la question : Hiya, my name is Saleena and I'm studying business at college. My question for you is what is the percentage change of turnover of the following supermarket.
Turnover (Millions)  ASDA
2001 10,732
2002 12,188
2003 13,326
2004  14,318
2005 14,865 Penny Nom lui répond. 





A mixture problem 
20070821 

Arul pose la question : Hi
Please help me with this question
Seed mixture X is 40 percent ryegrass and 60 percent bluegrass by weight; seed mixture Y is 25 percent ryegrass and 75 percent fescue. If a mixture of X and Y contains 30 percent ryegrass, what percent of the weight of this mixture is X ? Stephen La Rocque lui répond. 





Markup 
20070820 

Drew pose la question : I own a manufacturing business and I need to figure out the best way to mark up our products so that we can make a profit for this year. Say for instance we have a plow that we can make for $938.00. We need to mark it up 20% so that we have some income. Do we take the $938 x 20% = $1125.60 or $938 / 80% = $1172.50? Stephen la rocque and Harley Weston lui répond. 





Percentage change 
20070819 

nona pose la question : If inputs increase by 30% and outputs increase by 15%, what is the percentage change in productivity? Stephen La Rocque lui répond. 





Percentage calculations 
20070815 

Lorrinn pose la question : I process gifts for a nonprofit agency. For some gifts I calculate administrative fees. I understand calculating a straight percentage of a gift (i.e. 10% of $100.00 = $10.00). That's a fee "off the top". What I would like to better understand is the theory or the "mathematical reasoning" behind calculating percentages "on the inside". For example, to calculate 10% "on the inside" of $100.00, I use the following formula: $100.00/1.10*10.0%. The answer here is $9.09. I know how to do this, but I would like to better understand the "why". Thank you. Penny Nom lui répond. 





Percentage change 
20070813 

Karen pose la question : I need a formula for calculating percentages in Excel. For example, we =
sold 4 units of an item one month, and 105 units the next. I need a =
formula to calculate the percentage increase in sales units. Also, if =
5251 were sold one month and 651 the next, what is the formula for =
calculating the percentage difference? Please help, thank you. Penny Nom lui répond. 





GST and PST 
20070811 

Cynthia pose la question : I paid $15.98 for an item. Both GST (.96) & PST ($1.12) were added for a total of $18.06. I know that .96 is GST (6%) and $1.12 is PST (7%).
Other than looking at the receipt, if all I have is the total amount paid, how do I calculate how much of the total are taxes? Penny Nom lui répond. 





What percent of 68 is 51 
20070808 

Kurt pose la question : what percent of 68 is 51 Penny Nom lui répond. 





Buying and selling apples 
20070803 

Priya pose la question : Gorang bought 60 Kg of apples at Rs 48 per Kg. He sold 70% of the apples at Rs 60 per Kg and the remaining apples at Rs 35 per Kg.Find Gorang's gain or loss percent on the whole transaction. Stephen La Rocque lui répond. 





The cost of some groceries 
20070718 

A student pose la question : Two boxesof the cereal and our four cans of the pears were boutht at grocery store,the cereal cost $2.29per box and the pears cost 79cent per can.sales tax is 6% what was the total cost of the food diregerding ? Penny Nom lui répond. 





Discount percentage 
20070711 

Greg pose la question : List Price: $50.00
Discount: 33 1/3%
What would the net price be? Stephen La Rocque lui répond. 





Dried grapes and percentage of water content 
20070709 

Jyoti pose la question : Fresh grapes contain 90% water by weight while dried grapes contain 20 % water by weight. what will be the weight of dry graprs available from 20kg of fresh grapes? Stephen La Rocque lui répond. 





How many ounces in 782 cubic centimetres? 
20070703 

wilma pose la question : how many ounces in 782cubic centimetres Penny Nom lui répond. 





Finding the center of an ellipse 
20070620 

Sima pose la question : find the center of the ellipse with the equation 3x^2 +4y^2+18x32y5=0 Penny Nom lui répond. 





An 18% reduction 
20070615 

darren pose la question : I have a figure of 627.30 i need to find out what
the original amount was before 18% was taken away to leave the 627.30 Penny Nom lui répond. 





Percentage increase and decrease 
20070613 

Anna pose la question : I just want to if the following formula is used for the computation of a PERCENTAGE DECREASE:
Old Value  New Value/ Old Value x 100%
My immediate superior is under the impression that the said formula works ONLY for the computation of a percentage INCREASE. He believes that the formula for a percentage DECREASE:
Old Value  New Value/ NEW Value x 100%
On this score, I want to know the correct formula for the computation of percentage decrease. Thank you so much.
Penny Nom lui répond. 





Percent change over multiple periods of time 
20070607 

Eric pose la question : I am trying to show the percent change over multiple periods of time.
Is there a formula for the percent change over multiple periods or will I have to calculate the percent change for each previous period versus the year prior? Penny Nom lui répond. 





Percentage below the monthly quota 
20070607 

Greg pose la question : Sales quantities for the month were 12,834 with a monthly quota of 14,796. What is the percentage below the monthly quota? Penny Nom lui répond. 





A machine depreciates by 20% each year 
20070603 

katie pose la question : the value of a machine depreciates by 20% each year.
How would i find what single decimal number to multiple the original value by to find its value after 2 years? Penny Nom lui répond. 





The number of grams of sulfuric acid 
20070531 

cookie pose la question : Hi,
Can you please let me know if I've done this correctly?
Calculate the number of grams of sulfuric acid in 0.500L of battery acid if the solution has a density of 1.28 g/mL and is 38.1% sulfuric acid by mass. Stephen La Rocque lui répond. 





Fractions, decimals and profit 
20070529 

fatima pose la question : how can i change a fraction into a decimal and how do i change a
decimal into a fraction................
anther question please what does making a profit have
to do with percentage change!!!!!! Penny Nom lui répond. 





$450.00 six years at 7 percent 
20070528 

Donna pose la question : The future value of 450.00 six years from now at 7 percent Penny Nom lui répond. 





Percent difference 
20070517 

Carolyn pose la question : What is the % difference between these two numbers 211373 & 185420 Gabriel Potter, Penny Nom and Steve La Rocque lui répond. 





Percent 
20070507 

Art pose la question : what percent of 85 is 17? Stephen La Rocque lui répond. 





How many sales does she need? 
20070507 

Jimi pose la question : The new businessperson hopes to earn $50,000 per year. The profit percentage for this type of business is typically 10%. How much must sales be? Stephen La Rocque lui répond. 





Reverse Calculation of GST and PST in Quebec 
20070503 

Derek pose la question : Could you please tell me how to figure out the PST and GST paid on an item.
Example: I paid $10 total (including taxes) and the GST is 6% and the PST is 7.5%, HOWEVER, in Quebec, we pay the PST on the subtotal+GST.
Thanks, Derek Stephen La Rocque lui répond. 





My commsion is 2.5% 
20070502 

susan pose la question : How do you do percentage say i sold a house for 350,000 my commssion
is 2.5% how do i figure that out can you show the formula for calculator please thank you very much Penny Nom lui répond. 





Two concentric circles form an annulus 
20070502 

A student pose la question : In the diagram below, two concentric circles form an annulus. The
vertical line is tangent to the inner circle, and forms the diameter of
a third circle.
Explain why the areas of the annulus and third circle are the same. Penny Nom lui répond. 





Percentage change 
20070501 

katie pose la question : i no many people have asked about this but im still unsure what is percentage change i have my ks3 tomoro so please reply asap thankz Penny Nom lui répond. 





What percentage made a grade below 70? 
20070501 

Dee pose la question : There are 21 students in the class. 1 made a grade of 100, 2 made grades of 90 , 3 made 80,
4 made 70, 5 made 60, 6 made 50.
What percentage made a grade below 70?
I know 11 students made below a 70.
Please help me find the percentage, Penny Nom lui répond. 





Find her score 
20070501 

shelley pose la question : barb had 16 right answers and 5 wrong answers in the math competition. Find her score
Jason had 27 right answers and 4 wrong answers in the math competition. find his score Penny Nom lui répond. 





(ab)/b = c 
20070427 

Adam pose la question : What does
(ab)/b = c
represent when c is a percentage? Penny Nom lui répond. 





What is the Sales Tax? and Shipping? 
20070424 

Mark pose la question : 1 Item $4020.44
1 Item $1749.86
1 Item $11455.62
Total 17,225.92
The sales tax and shipping is included in the total. The sales tax rate is 8.75%
What is the Sales Tax? and Shipping? Stephen La Rocque lui répond. 





Find the percentage of the students that are here? 
20070423 

C. pose la question : If there are 260 students on roll and 11 of them are absent, how do i find the percentage of the students that are here? Stephen La Rocque lui répond. 





Two concentric circles 
20070419 

James pose la question : Two concentric circles have a chord running through the outer one. The chord is the tangent of the inner circle and is 14 cm.The outer circle is shaded and the inner circle is not. Find the exact area of the shaded region without using a calculator. Stephen La Rocque lui répond. 





I want to mark up a price by 5% 
20070419 

Steve pose la question : ok so i want to mark up a price by 5% or any percentage.
which is correct? ( this is done with a calculator with a % button)
a.
62*5% = 3.1 (3.1 + 62) = 65.1(total)
b.
62+5% = 65.263(total) (rounded to the 3rd decimal)
im trying to wrap my head around this.
the calculator has a button which does % all automatically.
Markup *20 which equal 5%.... Stephen La Rocque and Penny Nom lui répond. 





Fahrenheit and centigrade 
20070418 

kyrie pose la question : help ?
temperature formula: f and c represent degree's of temperature.
exact formula:
f = 9c / 5 + 32
approx formula:
f = 2c + 30
at what temp in c do these formulae give an equal value for f ? Stephen La Rocque lui répond. 





The orthcentre and the circumcentre 
20070405 

Ruby pose la question : I have tried to do this question so many times, could you please, please,
please show me how to do it. I just can't get the answer:
What is the (i)Circumcentre and (ii)Orthocentre of the triangle with
vertices a(2,2) b(2,6) c(5,3)? It would be so great if you could show
me how to do this. Thanks in advance,
Ruby. Penny Nom lui répond. 





How much did it originally cost? 
20070404 

Megan pose la question : My question is simple:
"Jim is able to sell a handcarved statue for $650 which was a 35% profit over his cost. How much did ie originally cost?"
I don't even know where to start could you help? Penny Nom lui répond. 





n($) x 35% equals $159,530 
20070329 

Christine pose la question : If n($) x 35% equals $159,530 what is n? Penny Nom lui répond. 





How do I extract 14% 
20070319 

Richard pose la question : I need to find the calculation to answer this;
I have the figure 379.28, how do I extract 14% from this figure
to extract 17.5% I div by 6.714, however i cannot find the formula
on how to do this an extract 14% Stephen La Rocque and Penny Nom lui répond. 





Percentage markup 
20070316 

Debbie pose la question : What formula or formulas do I use if I want to ultimately charge a customer $300 for a service, but need to factor in a 15% commission for a sales rep, $20 to cover the cost of our overhead, the cost of a $25 coupon that we will be sending to the customer to apply to future services. In other words, what amount do I initially quote the customer to be able to cover these costs? Stephen La Rocque lui répond. 





The Geosphere at the the Epcot Center park 
20070316 

stephanie pose la question : The epcot center has a diameter of 265 ft the park needs to paint the park one can will cover 400 sq ft how many cans do they need ? Stephen La Rocque lui répond. 





Percentage increase 
20070316 

Gerry pose la question : How do I figure the percentage between a small circle and a large circle Penny Nom lui répond. 





The percentage difference between 64.24% and 74.24% 
20070303 

M pose la question : What is the percentage difference between 64.24% and 74.24%? Stephen La Rocque and Penny Nom lui répond. 





Percentage markup 
20070223 

Jim pose la question : If a total amount includes a part price plus a markup percentage how do you calculate the part price if you know the markup % allowed. For instance : $810.00 includes a part plus 13.5% markup. How do I calculate the part price from this info? Penny Nom lui répond. 





Jim had 45 marbles and he lost 11 1/9% of them 
20070220 

Mesha pose la question : If Jim had 45 marbles and he lost 11 1/9% of them, how many had he left? Steve La Rocque and Haley Ess lui répond. 





What is 40% of 936? 
20070214 

naheem pose la question : what is 40% of 936 Sara Ulmer lui répond. 





Centimeters to cubic meters and grams to kilograms 
20070214 

Colleen pose la question : A box of balls measures 120cm by 20cm by 20cm and weighs 48 g. One thousand boxes = x cubic meters and weighs x kilograms. Also, one million boxes = x cubic metes and weighs x kilograms. One billion boxes = x cubic meters and weighs x kilograms. Solve for x. Stephen La Rocque lui répond. 





Square centimeters 
20070212 

Ivan pose la question : how many square centimeters are in a rectangle that is 210 centimeters long by 39 centimeters wide.? thank you Karen McIver and Melanie Tyrer lui répond. 





Two concentric circles 
20070211 

maria pose la question : i have a problem with this quadratic word problem which i am trying to solve it but couldn,t get it please help me to solve this question Two concentric circles are drawn, the radius of one being 2cm greater than that of the other. The area of the ring enclosed between the two circles is one quarter of the area of the smaller circle.Calculate the radii of the circles,correct to three significant figures. (Don,t substitute for pie) Stephen La Rocque lui répond. 





income percentages 
20070205 

karen pose la question : I would like to know what percent of a bill each person would pay based on the income differences one person makes 78968.00 and the other makes 52000.00 I believe it is 65% and 35%
so if a bill is 120.00 one person pays 78 and the other pays 42 is this correct thanks Stephen La Rocque lui répond. 





The centre and radius of a circle 
20070127 

A student pose la question : x^2+y^2=121 is the equation of the Circle C
(1) Write down the center and the radius of C. Stephen La Rocque lui répond. 





6.9 is 11.5 percent of what number? 
20070125 

David pose la question : 6.9 is 11.5 percent of what number? Penny Nom lui répond. 





Percent elevation gain 
20070124 

Susan pose la question : okay... so if I hike Gregory Canyon and it's a 1.1 mile hike with a 900 foot elevation gain, what's the percent elevation gain? Stephen La Rocque lui répond. 





Percentage markup 
20070116 

Lauren pose la question : MY DAD IS TRYING TO SELL PRODUCTS AT A 40% MARKUP. LET'S SAY THE COST IS $55.00. SHOULDN'T YOU JUST DO, 55 X 1.4 = 77 , SO THE $77 IS THE 40% MARKUP?? HE'S SAYING THAT YOU TAKE 55 / 60% = 91.67 . SO WHO'S FORMULA SHOWS YOU A TRUE 40% MARKUP OF $55.00 DOLLARS?????? Penny Nom lui répond. 





What is the percent of the decrease? 
20070110 

Bill pose la question : if the value of xyz company stock drops from $25 per share to $21 per share, what is the percent of the decrease? Penny Nom lui répond. 





13.78g /11.3mL 
20070105 

Judd pose la question : 13.78g /11.3mL Penny Nom lui répond. 





A percentage 
20061221 

Kim pose la question : At a company fish fry 1/2 in attendance are employees. Employees' spouses are 1/3 of the attendance. What is the percentage of the people in attendance who are not employees or employee spouses? Stephen La Rocque lui répond. 





Percentage increase 
20061221 

Wang pose la question : The last week of a month a car dealership sold 12 cars. A new sales promotion came out the first week of the next month and the sold 19 cars that week. What was the percent increase in sales from the last week of the previous month compared to the first week of the next month? Penny Nom lui répond. 





I want to convert milliliters into grams. 
20061214 

Kenchotenzin pose la question : I want to convert milliliters into grams. Penny Nom lui répond. 





Percentage increase 
20061129 

Toya pose la question : I have some statistics from year to year based on drug seizures.(units= lbs) e.g. in 2005 123lbs seized in 2006 1518lbs seized. now i worked out the percentage increase as to be in the thousands which from looking at the figures is correct however i don't want to say 1000% increase.
using another formula current previous *100 I got 92%. what exactly does this 92% represent and how can i use this number when presenting my answers instead of using 1000 + % Stephen La Rocque and Penny Nom lui répond. 





Percentages 
20061123 

Hyaqcinth pose la question : I just do not understand percentages...if the cost of a product is $1.20, how can I make a profit of 55% ? how do I calculate this problem? Stephen La Rocque lui répond. 





What percent of the people oppose putting in curbs? 
20061117 

DeeDee pose la question : The ratio of people who support putting in curbs to those who oppose it is 2 to 5. what percent of the people oppose putting in curbs? Stephen La Rocque lui répond. 





The semester grade 
20061103 

Caroline pose la question : Can you tell me how to calculate a grade based on a percentage formula where 15 assignments account for 40% of the grade and 3 tests account for 60% of the semester grade. Penny Nom lui répond. 





How much smaller is this one in percentage? 
20061024 

Michael pose la question : I have two different squares. One of them is smaller than the other. I need to know how to calculate how much smaller it is in percentage. 11.95mm x 6.72mm 11.2mm x 6.3mm How much smaller is this one compared to the one above in percentage? Haley Ess lui répond. 





Percentage differences 
20061023 

Michael pose la question : how do I calculate the percentage difference of a certain box size. for example. How much percent smaller is this box: 8.4mm x 6.3mm to this box: 9.35mm x 7mm Stephen La Rocque lui répond. 





Percentage increase 
20061015 

Amanpreet pose la question : in yr 7, bill was 1.28 m tall, in yr 9 he was 1.67m tall. calculate his percentage increase in height Stephen La Rocque lui répond. 





Plotting percentage change 
20061011 

Beckie pose la question : I have worked out a set of percentage differences which are all percentage decrease. Should i express them as a negative percentage as 20%? I also need to plot them on a graph and am not sure whether to just use the percentage difference as it is, in which case i get a positive gradient, or include a negative axis and plot them in this way, in which case i would get a negative gradient. I think the slope of the curve will be the same either way so it might not matter! Penny lui répond. 





2/3 as a percentage 
20061010 

Marlene pose la question : 2/3 is what percentage of a circle?
Penny Nom lui répond. 





What was the total cost of the dinners he served 
20060910 

Connie pose la question : Walter is a waiter at the town diner. He earns a daily wage of $100 plus tips that equal to .15 of the total cost of the dinners he serves. What was the total cost of the dinners he served if he earned $170 on Tuesday? Stephen La Rocque lui répond. 





Grossing up payroll wages 
20060827 

Katie pose la question : I really need to understand (spelled out step by step) how to gross up payroll wages. Penny Nom lui répond. 





Annual percentage yield 
20060817 

Joe pose la question : If you have $360,767 in a money market fund that has accumulated a total of $2,127 in year to date dividends (an eight month period January to August) what is the annual percentage yield. Penny Nom lui répond. 





Percentage Difference 
20060725 

Sandra pose la question :
I have two numbers (1530 and 1315). How do I calculate the percentage difference.
For example: I have one loader that lifts 1530 lbs. and another loader that lifts 1315 lbs. I know the difference is 215 lbs. How much greater lift capacity does the loader that lifts 1530 lbs. have than the loader that lifts 1315 lbs.?
The formula that I used was:
1530  1315 = 215
215/1315 = .163498 or 16.3%
Is this correct?
Stephen La Rocque lui répond. 





What is the interest on $50,000.00 at 5% for 40 days? 
20060712 

A borrower pose la question : What is the interest on $50,000.00 at 5% for 40 days? Penny Nom lui répond. 





A goods and Services Tax calculation 
20060701 

Carol pose la question : If I have $1700 how much of that is GST? Before the GST was changed to 6% you would multiply $1700 by .06542. Now what number do you multiply for 6% GST. No PST involved. Penny Nom lui répond. 





A percentage question 
20060628 

Terrence pose la question :
Given the percentage and the total amount, I need to know how to arrive at the total amount without guessing.
Example: 25\% of what is $298,750.00
Stephen La Rocque lui répond. 





Rates and percentages 
20060620 

Todd pose la question : If rates are about to rise 1.84%, from the current 5.30% that they are currently at. What amount are they going to increase to?
I ask because many publications print an answer that is 7.14% but I don't see that as correct because the first line would have to say an increase of 184 basis points for that to be correct. My answer to this is about 5.4%. Am I thinking correctly?
secondly, if rates are about to move to 7.14% from 5.3% what percentage move is this?
I get an answer of about 35%. am I off on this or is everyone else that I ask not calculating correctly? Claude Tardif lui répond. 





How much did I have in my wallet when I lost it? 
20060615 

Marangeo pose la question : I recently lost my wallet and when it came to completing the police report I couldn't remember how much money I had in there. I do remember thinking that the first time I bought something that it cost me 10 per cent of what I had. Then I noticed that the second purchase had also cost me exactly 10 per cents of what I had left. My receipts totalled $19. How much did I have in my wallet when I lost it? Stephen La Rocque lui répond. 





Can you explain the differences between margin and mark up? 
20060607 

Michelle pose la question :
I have a widget I buy for $10. I want to make a 40% margin on the product cost. What do I then sell to the customer for?
Also, can you explain the differences between margin and mark up?
Penny Nom lui répond. 





A 3% tax 
20060510 

Stacey pose la question : Illinois residents have to calculate their state income tax as 3% of their taxable income. If Mr. and Mrs. Grisham's taxable income for 2004 was $81,200, how much tax did they have to pay? Penny Nom lui répond. 





Percentage of weight 
20060426 

Karen pose la question : How do you calculate percentage of weight lost? Stephen La Rocque lui répond. 





How do I find the percentage interest? 
20060424 

Cheryl pose la question : Kiera invested $43,608 in a mutual fund that paid
$432.96 in interest at the end of the year. What was the percent interest Kiera earned from her initial investment? Stephen La Rocque lui répond. 





What's the difference between percentages and points? 
20060421 

Sayed pose la question : What is the difference between percentages and points? Stephen La Rocque lui répond. 





What is the original cost? 
20060419 

Charlie pose la question : Selling a piece of furniture for $670 and the profit is 35%. What is the original cost? Stephen La Rocque lui répond. 





How much money can I borrow if I have $5 000 for a deposit? 
20060419 

Chris pose la question : I have a sum of cash that I want to use as a deposit ($ 5 000) and a lender will lend me 65% of the purchase price. How do I calculate the maximum value I can borrow?
Stephen La Rocque lui répond. 





Reverse percentage 
20060419 

Mike pose la question : How would I calculate a reverse percentage?
Let me give you an example. I have two values that calculate to a success rate of 93.32. Total=1546051 Failures=103302. (1546051103302)/1546051=93.32% success.
Now how much would I need to increase the total value to get the success up to 95%? Stephen La Rocque lui répond. 





Price percentages 
20060413 

Kristine pose la question : An item that is no longer on sale at "25% off" receives a price tag that is 33 1/3% more than the sale price. Has the item price been restored to its original price? Why or Why not? Stephen La Rocque lui répond. 





Markup 
20060407 

Larry pose la question : Calculators from different manufacturers work differently. Enter 100, then plus 15%, on some calculators you'll get 115 on others return 117.65 . On any calculator, enter 100, then divide by 0.85 (point 85) and you'll get 117.65 .
I don't understand this well enough to explain to my grandson, but as a salesman, I know which one to use. Penny Nom lui répond. 





A square in a circle 
20060405 

Lisa pose la question : A square is inscribed in a circle. Determine the percent of the circle's area that is outside the square. Stephen La Rocque lui répond. 





List price plus 10% 
20060403 

Heather pose la question : We shipped 2 pieces of an item with a unit price of $578.74 for a total amount of $1157.48. My task is to bill the customer at LIST + 10%. What formula do I need to use to calculate this? penny Nom lui répond. 





The centre and radius of a circle 
20060402 

Kaye pose la question : I need to calculate Dimension E and F. I am given A, B, C, (or over all A+B+C), D, G. The radius is one continuous unknown radius.
Example: A = 23.50
B = 35.50
C = 0.50
D = 11.50
G = 23.50
I have calculated this for angles but my mind is drawing a blank for the radius calculation. I can draw it but I need to put into Excel spreadsheet.
Harley Weston lui répond. 





What percentage of the seniors polled yes? 
20060320 

Jean pose la question : An equal number of juniors and seniors responded to the question, "Do you like math?" Each respondent said yes or no. If 70% of those who said yes were seniors and 80% of those who said no were juniors, what percentage of the seniors polled yes? Penny Nom lui répond. 





A bill with a 15% tip and a 10% discount 
20060320 

Tracy pose la question : A $4500 bill is presented, without tax. 10% discount coupon. Add 15% tip with 3 people spitting for the sever. Penny Nom lui répond. 





Gross profit as a percentage 
20060318 

Mark pose la question : How do I calculate the gross profit by percentage on and a product I purchased for $23.80 marked up 45% sold for $34.51 = profit of $10.71 GP by percentage???????? Penny Nom lui répond. 





A reduction of 10% in the price of tea 
20060308 

Bidhu pose la question : A reduction of 10% in the price of tea enables a dealer to purchase 25 kg more tea for Rs 22500.What is the reduced price per kg of tea?What was the original price per kg? Stephen La Rocque lui répond. 





If something costs $40, and they took 20% off, what is the original price 
20060304 

Kevin pose la question : If something costs $40, and they took 20% off, what is the original price Penny Nom lui répond. 





A 5900% increase 
20060303 

Pat pose la question : I want to find out the % of production increase from 250 dolls a month to 15,000 dolls a month. i think it is 5900% but that seems too high. Penny Nom lui répond. 





An account that earns 6% annually 
20060301 

Christine pose la question : How much do you have to deposit to an account that earns 6% annually if you want to earn $1200 on the account? Stephen La Rocque lui répond. 





Cutting off the top of a triangle 
20060222 

Ken pose la question : I'm a creative type who needs to find how you can determine the horizontal, relative percentages within a triangle. Attached is a pdf showing approximately the
50% line, but I'd like to know how to determine any percentage (horizontally) within a triangle . I know that if I put a horizontal line though the height of the triangle I won't be showing 50% above and 50% below. The bottom part has to be larger (correct me if I'm wrong).
I'm not concerned about height as I am wanting to break down the percentages into 60% at the bottom, 25% in the middle and 15% at the top.
Penny Nom lui répond. 





What percentage of 120 is 24? 
20060222 

Julie pose la question : What percentage of 120 is 24? Penny Nom and Stephen La Rocque lui répond. 





A man sells a refrigerator for $171 
20060220 

Skye pose la question : A man sells a refrigerator for $171, gaining on the sale as many percent (based on the cost) as the refrigerator cost, C, in dollars. Find C. Stephen La Rocque lui répond. 





A 35% discount 
20060219 

Marc pose la question : If Julie paid $455.00 for a television and it was already discounted by 35% what was the original price? Penny Nom lui répond. 





Percent gain 
20060214 

Bill pose la question : If a stock is bought at $3.50 and sold at $5.80, what percent was the gain? Penny Nom lui répond. 





Working with percentages 
20060210 

Mark pose la question :
Hi, i have problem...i am trying to average a group of numbers....when i try to average the average...its gives a different results:
A 
b 
c 
d = A/(bc) 
1169 
1173 
1 
100% 
534 
540 
0 
99% 
358 
359 
0 
100% 
172 
174 
0 
99% 
. 
. 
. 
. 
. 
. 
. 
. 
. 
. 
. 
. 
2375 
3422 
24 
70% 
1976 
3677 
42 
54% 
1431 
3660 
53 
40% 
187 
3433 
57 
6% 
761 
3142 
39 
25% 
2080 
2109 
7 
99% 




38280 
49121 
266 
78.35% 
When I try to average column D  it yields to 86.73% and not 78.35?
Please help me
Penny Nom lui répond. 





More on percentges 
20060210 

Rich pose la question : I need to dilute several owners who combined own 66% down to 50% and increase the 34% owner to 50%. I thought it was as simple as taking 16% away from each of the 66% and transferring that amount to the 34%, but it doesn't add up. Penny Nom lui répond. 





A percentage question 
20060209 

Graham pose la question : If i order 700 lines in total, 500 lines on order A and 200 lines on order B how bo i work out the percentage of lines ordered on order A Penny Nom lui répond. 





Mixing 
20060203 

Caren pose la question : If I am 75% flippino and 25% white and the guy is full white what will be the whole percentage of the flippino and white nationality in the baby? Penny Nom lui répond. 





What is 3.5% of 4000.00? 
20060131 

Ellen pose la question : What is 3.5% of 4000.00?
What is 3.5% of 2000.00? Penny Nom lui répond. 





Percentage increase in sound intensity 
20060129 

David pose la question : I am doing some emotion response mapping.
Being a composer I know how to push the heart beat tempo by a % increase of BPM in my music. I want to know how to calculate an increase in intensity of sound. Now I have 60 decibels. I want an increase of intensity by a factor n% with out going over 156 decibels.
Penny Nom lui répond. 





Percentage weight change 
20060124 

Abdul pose la question : what is the percent change if a person's weight changed over 3 years:
year 1995 1997 1998 %change(19951998)
weight 63kg 67kg 73kg ......... Penny Nom lui répond. 





Our client wants to make 25% from their sale... 
20060124 

Noelle pose la question : I need to figure out how to figure pricing for our clients. If our client wants to make 25% from their sale and they purchase it from me for $35.95, how do I figure what their cost is? Penny Nom lui répond. 





A circle problem 
20060123 

Matyan pose la question :
Find the standard equation of the circle that passes through the points (0,4) and (3,7) with center on the line
2xy+4=0.
I've tried substituting the two points to the general equation of a circle, but I can't solve it without a third equation. The problem here is I don't really know how to use the given line of 2xy+4=0. Please help. Thank you.
Penny Nom lui répond. 





Markups and discounts 
20060121 

Dan pose la question : I'm trying to increase my pricing by 30 percent. I'm doing something completely wrong. If my price is $150.00 and I increase the price by 30 percent. I would take 150 times .30 and that equals 45. I would then take 45 plus 150 and that would give me 195. My problem is now 195 is my list price. If I turn around and give my customer a 30 percent discount off the 195 the price ends up being 136.50. Which is less than the 150 that I started with. I'm confusing myself and have totally lost confidence in what I'm doing and how . Can you help me? Penny Nom lui répond. 





The centroid of a triangle 
20060118 

Andrea pose la question : I am trying to find the centriod of a triangle. I have been given the three vertices of the triangle: A (25, 20), B (5, 40), and C (15, 30). I believe I calculated the correct midpoints: AB(E) (5, 5), BC(D) (5, 5), and AC(F) (15, 30). When I graphed these points I came up with the solution (5, 10), but I can't seem to write the answer out (equations of the lines, etc) correctly. Any help would be greatly appreciated! Penny Nom lui répond. 





Percentage discount 
20060115 

Louise pose la question : Avril is buying a computer. She finds two places with a discount."Classy Computing" is selling a computer that was £650 and NOW it has £50 off.
"WWW.CHEAPO.COM" is also selling a computer that is £650 but it NOW has 10% off.
WHICH IS CHEAPER? Penny Nom lui répond. 





Percentage markup 
20060110 

Ian pose la question :
I have a markup question for you. I work for a painting company, specifically I estimate cost and sell painting projects. Within our office, we've had some discussion on how markup should be calculated for materials that we include in our prices. These are the two scenarios that we've come up with.
1. Mark up as a percentage of the cost: Cost = $ 10.00 X 15% Markup = $ 1.50. $ 1.50 + $ 10.00 equals $ 11.50 as a sale price.
2. Selling Price = Cost / (1the desired profit margin). This would equal to $ 10.00 / (1.15) = $ 11.76 roughly.
If you have any information on whether one is more correct and why, I would appreciate this. I want to make sure that I am marking things up correctly.
Harley Weston lui répond. 





10% of 20% of 40% of ... 
20060108 

Michael pose la question : What is 10%
Of 20%
Of 40%
Of 80%
Of 1000? Penny Nom lui répond. 





Milliliters, centiliters and hogsheads 
20060103 

A worried teen pose la question : How many milliliters are in a centiliter?
and What is an equivalent to a hogshead in liquid measuring? Your help is greatly appreciated. Sincerely worried teen
Penny Nom lui répond. 





Percentage change when you start from zero 
20060102 

Joseph pose la question : I am not sure if my meaning for calculation for a percent change (CP/P)x100) is correct. In this case, C=10, P=0, does this mean 100 percent increase from previous period? Harley Weston lui répond. 





Percentages in our daily life 
20051223 

Naina pose la question : what are the uses of percentages in our daily life Penny Nom lui répond. 





Percent change 
20051217 

Marie pose la question : What is the percentage change when 1500 becomes 2000? Penny Nom lui répond. 





Percentage increase 
20051215 

Luiz pose la question : I would like to know how much net income in % we have increased from 2005 to a 2006(projection).
2005 Net Income Actual: $1,599,887
2006 Net Income Budgeted: $2,067,339 Penny Nom lui répond. 





what is 5'7 
20051126 

A student pose la question : what is 5'7" inches in cm? Harley Weston lui répond. 





Percent or percentage 
20051103 

Kenneth pose la question :
Which word should be used in the following?
Change a (percent or percentage) to a decimal.
Should the word percent be used only when a number precedes it as in 45 percent?
Harley Weston and Chris Fisher lui répond. 





Marked down 31% 
20051027 

Virginia pose la question :
Question: How do you calculate a percentage back into a cost?
Example: $1,025.00 sale cost and I want to add 31 percent back into it for a list cost.
Penny Nom lui répond. 





Inches and millimeters 
20051008 

Ron pose la question : You know they say 14mm = 9/16" or something of that nature, i need to know exactly how this is done. Chris Fisher lui répond. 





Inches and millimeters 
20050930 

A student pose la question : how many inches are there in mm? For example 30x40 mm = how many inches. Penny Nom lui répond. 





Markup 
20050922 

Cassie pose la question : The retail price of a car stereo is $265 and the markup rate is 68%. What is the wholesale price of the car stereo to the nearest dollar. Penny Nom lui répond. 





Percent markup 
20050919 

Dan pose la question : If a product cost $2.00 and sells for $2.00 there is 0% markup
If a product cost $2.00 and sells for $4.00 there is a 100% markup
If a product costs $2.00 and sells for $6.00 there is a 200% mark up which I don't understand I would think that the markup would be 300%
If a product costs $2.00 and sells for $8.00 there is a 300% mark up " " " " " " " " " " 400% Claude Tardif lui répond. 





Percentage increase 
20050919 

Dory pose la question : Last year sales was 120,000 $ and this year sales is 280,000 $, there was an increase in sales. what I would like to know is the percentage increase between the years with the formula. Penny Nom lui répond. 





What is 3% OF $200.00? 
20050914 

Glenda pose la question : What is 3% of $200.00? Penny Nom lui répond. 





Is this percentage change or percentage increase? 
20050815 

Betty pose la question : When calculating a percentage, if the formula is
A(new)  B(old)/A(new)
Is this percentage change or percentage increase? Penny Nom lui répond. 





10% of $50 
20050716 

A student pose la question : If I had $50 and 10% of it had to go to my mother, how much would I have left? Penny Nom lui répond. 





A percentage of the whole 
20050716 

A student pose la question : two people both own property and would like to combine their properties into one. the first person contributes 1 acre and the second person contributes 1.5 acres. of the whole, how much percent does the first person own? Penny Nom lui répond. 





What percent of 100,000 is 629.77? 
20050708 

Someone pose la question : What percent of 100,000 is 629.77? Penny Nom lui répond. 





Percent change 
20050701 

Betty pose la question : Can you tell me the difference between Percentage Change, Percentage Increase, Percentage Difference and please give an example of each, I am very visual. Penny Nom lui répond. 





Profit of more than 100% of cost 
20050622 

sam pose la question : I know I can work out what percentage profit I am making by : profit/cost x 100, and I can work out up to 99% profit (the way I currently calculate it is profit x 1.99) But how do I work out any amount over 100%, say for instance I have something that costs me $0.52 that I wish to sell for 250% profit? Penny Nom lui répond. 





20% profit 
20050612 

Shawn pose la question : If I know that I will be paid, say, $150.00, for labor, and I want to make
20% profit on what I pay for the labor, what is the calculation and factoring
process?
I see it like this
(x*.2)+x = 150
but I don't know how to factor it out from there. Penny Nom lui répond. 





Cost price 
20050525 

Sunitha pose la question : What is (how to calculate) the cost price of a product which is markedup by 15% and retailed at $25? Penny Nom lui répond. 





A 5% increase 
20050427 

Debra pose la question : How can I determine the increased percentage of a dollar amount? I.e.: One dollar amount is $202 and another is $150, how can I determine the 5% increase from last year on the $202 dollar amount? Claude Tardif lui répond. 





40% profit 
20050419 

Carol pose la question : Could you please tell me the formula to calculate for example a 25% profit on cost.
I.e a sandwich cost .75p for the cost of ingredients, I wish to make a 40% profit on that cost so what do I multiply and divide it by to arrive at the selling price in order to achieve a 40% profit? Penny Nom lui répond. 





Percentage increase 
20050419 

Tom pose la question : What is the percentage increase from (negative $9262.00) to (positive $3840.00)? Penny Nom lui répond. 





Centimeters, millimeters and milliliters 
20050419 

A student pose la question : How many milliliters in a centimeter? Penny Nom lui répond. 





A 25% markup 
20050407 

Jason pose la question : I want to markup $2.00 by 25%...How do I do this??? Penny lui répond. 





The centroid of a triangle 
20050407 

Maria pose la question : Q3)find the coordinates of the centroid of triangle ABC
i want your help here to solve the 3rd question i got stuck. Penny Nom lui répond. 





The benefits of saving for retirement 
20050311 

Nick pose la question : A human resources department wants a report that shows its employees the benefits of saving for retirement. Produce a report that shows 12 predicted retirement account values for each employee  the values if the employee saves 5, 10, or 15% of his or her annual salary for 10, 20, 30, or 40 years. Assume that savings grow at a rate of 8% per year. Not really interested in answers, just the equations to solve the problems. Penny Nom lui répond. 





Reverse pecentage 
20050301 

Nathan pose la question : Question for you. If I have spent $10.00, what is the mathamatical equation to
figure out what the G.S.T (7%) was?
Also if I were to spend $80.00 on a hotel, and I would like to know how much
G.S.T (7%) and how much provincial tax (6%) I spent how would I go about this.
Penny Nom lui répond. 





A triangle question 
20050226 

John pose la question : H=10' 7and3/4",angleX=30 degrees solve for the adjacent side Penny Nom lui répond. 





$14k is 22% of ________ 
20050219 

A parent pose la question : When one knows the
percentage, and a known number, how is the unknown total figured? In other
words, I know that $14k is 22% of what number?? Claude Tardif and Penny Nom lui répond. 





Sales before tax 
20050209 

Lynda pose la question : I know my total sales for the month, which includes sales tax. How do I get to the sales dollars before the sales tax? Penny Nom lui répond. 





Are the vetices of this quadrilateral concyclic? 
20050130 

A student pose la question : Show that the peints A(2,0),B(6,6),C(1,7) and D(2,6) are concyclic. Also find its circum radius. Chris Fisher lui répond. 





Cost before the markup 
20041123 

Norman pose la question : the sum of eg $130 includes the markup of 30%.
However I need to calculate the percentage to apply to the $130 to assess the cost ie $100. Penny Nom lui répond. 





A 40% reduction 
20041110 

Cathy pose la question : I'm having trouble figuring out how to figure a percentage??? it's easy to find what 40% of any given number is, but how would i accurately figure out what is the final number is when i know the number after the 40% has been removed? when i add 40% to this number it obviously is lower than it should
be. the best i could figure is;
x=?40% > x?=40% i'm all confused???? Penny Nom lui répond. 





42.5 is what % of 170? 
20041105 

Dawn pose la question : 42.5 is what % of 170? Penny Nom lui répond. 





Adding 3% to get 120,000 
20041102 

Shaun pose la question : I was asked a question by a friend of mine's kid. He asked me if you had a final figure of say 120,000, how do you work out the amount you started with if you added 3% of the starting amount, to the starting amount to get the 120,000.
Paul Betts lui répond. 





Vectors in three space 
20041030 

Jo pose la question : I have two questions that I just cannot visulise and dont know how to get started on them..!
1. Ship X is sailing North at 4m/s and Ship Y is sailing due East at 3m/s. A sailor on Ship X climbs a vertical pole at 1/2 m/s. What is the velocity of the sailor on Ship X relative to an observer on Ship Y? State it's magnitude and direction.
Not sure where to start with this one...
2. Show, using vectors, that for any tetrahedron, the segments joining the midpoints of the opposite edges are concurrent.
i know what a tetradedron is, and what I am proving but do I solve simultaneously for a specific case?? Walter Whiteley lui répond. 





Ratios and rates 
20041027 

Kenneth pose la question : What is the difference between a ratio and a rate? Penny Nom lui répond. 





A 40% increase in garage space 
20041020 

Dianna pose la question : A bus company recently expanded and no longer has enough room in its garage for all of its buses. Twelve of the buses have to be stored outside. If the company decides to increase their garage space by 40%, this will give them enough room for all of their current buses, plus enough room to store another twelve in the future. How many buses does the company own? Penny Nom lui répond. 





$25,000 at 11% per year 
20041013 

A student pose la question : suppose u have $25,000 to invest and the interest rate at your bank is 11%.
1) how much money would you have at the end of EACH of the first four years?
1) i already kno that the first year w/ interest is $27,750 but how do i get the 2nd? 3rd? 4th? years? Penny lui répond. 





37% 
20040926 

Andrew pose la question : how do we change 37% into a fraction Penny Nom lui répond. 





Payment plus interest 
20040914 

Penny pose la question : Brian wants to borrow some money from Margaret.
After three years he is to pay X back plus one interest sum of 25%. If he is pays back a total of $3800, what was the original sum borrowed? Penny Nom lui répond. 





105.6 is a discount of 12% from x 
20040910 

David pose la question : If I know that 105.6 is a discount of 12% from x, how do I find x?? Penny Nom lui répond. 





Percentage change 
20040830 

Lauren pose la question : if egg A weighed 55.4g and after 2 days it weighed 60.9g how could i calculate the percentage change in weight? Penny Nom lui répond. 





69 is what percentage of 113 
20040828 

Mary pose la question : How do I work out what percentage of 113 69 is? Penny Nom lui répond. 





Percentage of a quota 
20040826 

Jenni pose la question : I have the year to date sales of $2,042,744 and the quota is $2,257,440, how do I figure the percent quota. Penny Nom lui répond. 





130 cc. is ? 
20040820 

Ayrn pose la question : 130 cc. is ?
I have to put 130cc. of petroleum in a bucket how much exactly is that?
Also 110 cc.?
I have to also put 110cc. wood alcohol in a bucket aswell! Penny Nom lui répond. 





Percentiles 
20040815 

Gary pose la question : Table 1
Selected percentiles for family income in the US in 1992
1 $1,300
10 $10,200
25 $20,100
50 $36,800
75 $58,100
90 $85,000
99 $151,800
Q. The percentage of families in Table 1 with incomes below $58,100 was about? Penny Nom lui répond. 





The circle through three points 
20040706 

Jim pose la question : I am a student trying to solve math problem. I'd like to calculate the radius of the circle that exactly fits any three points. If the points are (X1,Y1), (X2,Y2), and (X3,Y3), what is the radius of the circle that contains those three points? Penny Nom lui répond. 





Percentage markup 
20040604 

A parent pose la question : if our cost is 54.00 and their cost is 117.00 what is the percentage of mark up? Penny Nom lui répond. 





The center of a circle 
20040526 

Wan pose la question : I am trying to find the radius of an arc. The only things i know about the arc is all referenced from the line of tangency to the arc. on both sides i have a differnt horizontal perpendicular distance to the point of tangency.
left side * right side (*=point of tangency). Then i have 2 difference vertical perpendicular distance of the end points to the line of tangency. I know it sounds very bad in text but this is all i know about the arc. Can you help me find the radius? Penny Nom lui répond. 





Percent difference 
20040410 

A parent pose la question : For a school science project, my son Alex is taking measurements of plant growth at regular intervals. As part of the data, he must provide the maximum percent difference observed in the categories his team has identified.
So, for example he has six plants with four measurements each. (He has more, but I'll keep it simple) For the first plant he measured 2mm, 2.4mm, 2.9mm, and 3.2mm. For the 2nd, 3rd, and 4th plants, he has similar numbers. Is there a way to calculate the maximum percent difference between any two plants in his measurements during the project? Doing it for each combination would be tedious. Penny Nom lui répond. 





Differences in percentages 
20040406 

Jose pose la question :
Question:
You have two groups:
Group A has 10 people and 2 are Chinese
Group B has 12 people and 3 are Chinese
In terms of percentages what is the difference in Chinese between the two groups? In other words which group has the biggest percentage of Chinese and why?
Penny Nom lui répond. 





425 cc's of a saline solution 
20040330 

Julie pose la question : 425 cc's of a saline solution is equal to how much in lbsweight?? Harley Weston lui répond. 





Percentage difference 
20040328 

Someone pose la question : what is the percentage difference between 157 to 251 Penny Nom lui répond. 





A fraction of a fraction as a percent 
20040318 

Mary pose la question : I would like to know if you could help me with this problem? Could you
take me though the steps
to this math problems.
3 =(?)% x 3
 
16 4
the question states: Finding what is the percentage of a fractional
number and another fractional number. Penny Nom lui répond. 





GST and PST 
20040226 

Mallory pose la question : I was absent on the day that my teacher taught the class how to find the GST and PST of items. I sort of understand that GST is 7% and PST is 7.5%, but our teacher said that we shouldn't combine the two to find the total amount... I'm really confused, so can you please help me?& Claude Tardif lui répond. 





The point where all the medians meet 
20040225 

A student pose la question : What's the name of the point where all the medians meet? Penny Nom lui répond. 





Profit, markup and discount 
20040222 

Kick pose la question : Using the calculation on your website, if I sell something for $885 and my cost is $296, I make $589 profit. How do I calculate the profit percent I made on that transaction?
Profit as a percentage of what it cost me?
Profit as a percentage of what I sold it for?
Penny Nom lui répond. 





Profit 
20040212 

Mohamed pose la question : if i bought some thing with 100$ and the saller told me that his profit was 30% how can i know the actual price of the good Penny Nom lui répond. 





The incline of an exercise machine 
20040202 

An exerciser pose la question : This is a question about incline percentage. On an exercise machine if the elevation is raised 3 and one half inches from a level position then what would be the incline percentage? Penny Nom lui répond. 





Ounces into cubic centimeters 
20040127 

A student pose la question : how do you convert ounces into cubic centimeters? Ex: how does 12 oz. change into cc. Penny Nom lui répond. 





3/8 as a decimal 
20040113 

A student pose la question : My Math Midterm is tommorow and I am stumped... how do you turn 1 and 3/8 into a decimal... I know the answer is 1.375 but I just copied down what the teacher wrote on the board.
Oh, and what are the three cases of percents? Penny Nom lui répond. 





Percent increase 
20031224 

Frank pose la question : How does one figure the percent of increase or decrease in the cost of an item? Penny Nom lui répond. 





Adding percentages 
20031219 

Paula pose la question :
How do you add percentages
e.g 90% + 80% + 60% + 54% + 25% = ?
Penny Nom lui répond. 





What percentage of 6 billion is 40 million? 
20031203 

GiGi pose la question : What percentage of 6 billion is 40 million? Penny Nom lui répond. 





Markup, profit and margin 
20031124 

Ali pose la question : I have question regarding Margins, Markups and Profit
Purchase price = $ 10.00
Margin or Markup ?? = 40 %
Therefore Selling Price = 10/0.6 = $ 16.67
Profit ? = (16.6710)/10 *100 = 66.67%
or is the profit = (16.6710)/16.67*100 = 40 %
Can you please clarify What is Margin, Markup and Profit Penny Nom lui répond. 





962 Sq. Ft. is what percent of 2656 Sq. Ft 
20031120 

Jon pose la question : 962 Sq. Ft. is what percent of 2656 Sq. Ft Penny Nom lui répond. 





X bar 
20031104 

mary pose la question : Remind me what this means:
_
X
Andrei Volodin lui répond. 





Knitting gauge and felting 
20031027 

Sara pose la question :
I wish to create a pattern to knit an item that will then be felted, thus, shrink as a result. In order to determine the proper gauge to use in creating the item, I produced a gauge swatch, noted the original properties and then the postfelting properties. They are as follow: Before Felting: 20 stitches(width) x 20 rows(height)yielded: Gauge: 3.2 stitches(width) and 4 rows(height) = 1" Dimensions: 6.25"(width) x 5.25"(height) After Felting: 20 stitches(width) x 20 rows(height) Dimensions: 4"(width) x 3"(height) How do I calculate the percentage change in size to accurately determine the number of stitches and rows needed to produce the desired dimensions for the finished (felted) item? Penny Nom lui répond. 





Maine and Nevada 
20031024 

Jimmy pose la question :
From 1989 to 1990, the population of Nevada increased b y 157,000, and that of Maine increased by 30,000. In 1990, the population of Nevada was 1,206,152, and that of Maine was 1,233,223. If the populations of the two states continue to increase at the same rates, when will the populations of Nevada and Maine be the same? Write a verbal model for this problem Write an equation for the model Solve the equation and answer the question. Penny Nom lui répond. 





Grooming the king's horses 
20030904 

Janelle pose la question : the stable boy had 90% of the kings horses groomed.the next day the king acquired 25% more horses. Now there was 105 horses not prepared for the kings men. How many horses did the king originally have? Penny Nom lui répond. 





One percent of a billion 
20030904 

Charles pose la question : What is one percent of one billion? Penny Nom lui répond. 





Why percentage? 
20030903 

Vicky pose la question : My cousin aske me a question about the use of percentages and I'm not sure how to answer it. He wants to know why when there is a sale in a shop we use percentages and not fractions or decimals. Penny Nom lui répond. 





Percentage markup 
20030903 

Virginia pose la question :
I am confused and hope you can help. I have looked high and low for a "chart" persay to go by when I am having to calculate markup percentages. Example if I have a List price of $1838.00 and my cost is $955.76 and I want to mark it up 30%. My colleage says it should be divided by .7 I don't understand how he arrives at .7 from 30 percent. Claude Tardif lui répond. 





Profit margin 
20030903 

Chet pose la question :
My salesman calculates a customers profit margin by dividing what the customer paid by what he sells for, then subtracting that answer from 1. For example a customer sells a product for $15. He bought it for $10. 15/10=.66 Subtract that from 1 and get a profit % of 33% Here's my question: If I want to figure what a reseller will sell a product for if he wants 40% margin(by the technique above), what formula do I use? Let's say I want to sell a product for 8.50, and I want the reseller to make 40% Penny Nom lui répond. 





20% of 40% of 500 
20030831 

A student pose la question : What is 20% of 40% of 500? Penny Nom lui répond. 





Percentage decrease in sales 
20030731 

Linda pose la question : If I had sales in January of 2002 that were $42,493.73 and sales that were $37,281.59.Ý The difference is $5374.50.Ý What is the percentage of decrease in sales? Penny Nom lui répond. 





Preparing 100ml of a 30% alcohol solution 
20030713 

Justin pose la question : My question is how do you prepare a 100ml of a 30% alcohol solution using 95% alcohol? Penny Nom lui répond. 





An onsale DVD player 
20030709 

Kim pose la question : I have a DVD player with a regular selling price of $175 and percentage of discount is 10 percent. How to solve for discount amount and sale price? Also, when you figure out the sale price how to figure out commission amount when percentage of commission is 5 percent? Penny Nom lui répond. 





A 40% markup 
20030612 

Nick pose la question : I am attempting to determine the Retail price of an item that costs me 11.00. Our company wants to sell it at a markup of 40%. I calculated this two ways, first the way I thought it should be done. Second, the way the calculator does it (and my accountant).
 Cost + Cost*(percentmarkup/100)= retail price 11.00 + 11.00*.40 = retail price 11.00 + 4.40 = 15.40 retail price
 Using the calculators Mark Up key the answer is 18.33. Or 7.33 more than the cost or 67%.
I am confused by this Mark Up key and how it calculates. I used a cost of $10.00 and marked it up 50%. I thought it should equal $15.00 but the calculator says $20.00? This seems to be 100% markup, yes? Can you explain the difference between the way I did it and the way a Business calculator does it? Penny Nom lui répond. 





$22,534.56 is what percent of $27,820.00? 
20030604 

Minnie pose la question : $22,534.56 is what percent of $27,820.00? Penny Nom lui répond. 





20% of 40% of 500 
20030427 

A student pose la question : What is 20% of 40% of 500 Penny Nom lui répond. 





______cm=0.048km 
20030227 

Antonette pose la question : ______cm=0.048km Penny Nom lui répond. 





Percentage change in completion rate 
20030221 

Remo pose la question : In the year 2000 300 out of a possible 600 completed a phone survey for a total of 50% completion rate. In the year 2001 20 out of 100 possible people completed the survey when it was redone. This is a completion rate of 20% To figure out the percentage change between the years can just use the difference between the percentage figures I already have? Or can I calculate it the same as you would for nonpercentage numbers. For example you gave an example here of a salary increase from $20 to $95 being an increase of 375%. Would I solve my problem the same way expect substituting my percentages (.5 and .2) in place of $20 and $95? Penny Nom lui répond. 





Deduct 60% from $150.00 
20030221 

Mike pose la question : How do you get this answer? deduct 60% from $150.00 Penny Nom lui répond. 





Percentage decrease 
20030220 

Hope pose la question : What number decreased by 33^{1}/_{3}% is 30? Penny Nom lui répond. 





Two investments 
20030207 

A student pose la question : you have $7200 in principal and invest different sums @ 10% and 14%. You receive 920 at end of term. (one year)What amounts are invested at what rate? Penny Nom lui répond. 





A 15% markup 
20030207 

Holly pose la question : what is 15% markup of 58.89? please show equation and why? which is correct? 58.89 divided by .85 or 58.89 times 1.15 Penny Nom lui répond. 





25% more 
20030116 

Charlie pose la question : If I buy something for $10 and want to sell for 25% more, do I multiply by 1.25 or divide by .75? Or another way  why do I get $13.33 when dividing by .75 ? Penny Nom lui répond. 





Averages of Averages 
20021221 

Amy pose la question : If in the month of October the % of Payments Received was 80.74% and in November it decreased to 69.36%. Can you take the 80.7469.36/69.36 to get the % of difference. In otherwords can you take the % of difference when the numbers you are comparing are %'s???? Can you also take an average of an average? For example, average number of payments received in October was 25.00%, average number of payments received November was 50.00%, and the average number of payments received in December was 15.00%. Do you average (25.00%, 50.00% and 15.00%) or do you have to go back to the numbers that calculated the averages. For example, October 25.00% was based on 25 payments being received out of a possible 100. So instead of taking the average of the averages, do you take the average payments and the average customers over the 3 months and calculate the average??? Harley Weston lui répond. 





20% of 40% of 500 
20021219 

Richard pose la question : What is 20% of 40% of 500? Penny Nom lui répond. 





Tiffany plays first board for her middle school chess team 
20021202 

Patty pose la question : Tiffany plays first board for her middle school chess team. Since she joined the team last year, she has won 27 of 51 tournament games. That's a winning percentage of about 53%. If Tiffany went on a winning streak, how many games would she need to win in a row to raise her winning percentage to 60% Use variables and equations to communicate the method you've used to solve the problem. Penny Nom lui répond. 





What percent is the same as three eighths? 
20021121 

Katelin pose la question : What is the percent of three eight's? Penny Nom lui répond. 





A 40% markup? 
20021115 

Amy pose la question : Please help? I own a basket and bouquet company, I have two retail stores with a markup of 40% on the price of the items I sale to them. I do not understand their conversion chart and I hope you can help me. A bouquet that I sale for $12.50 wholesale to the retail is marked up at a rate of 1.675 or (40%). I do not understand how the calculation of 1.675 is arrived at ... how is this 40%. I was told to multiply my wholesale price of $12.50 X 1.675 and I would arrive at the markup price of 40% the retailer would sale the item for. Penny Nom lui répond. 





A bus is 60% occupied 
20021109 

Joe pose la question : A bus with a seating capacity of 60 people is 60% occupied. At the next stop onethird of the people get off the bus and 3 people get on the bus. The bus is now ___% occupied. Penny Nom lui répond. 





Cubic centimeters 
20021107 

Rita pose la question : Was in emergency room yesterdayMD aspirated 40cc of fluid from my kneewhat does a "cc" equate to? Penny Nom lui répond. 





The percentage grade of that hill 
20021105 

Cathy pose la question : If there is an 80ft climb over a kilometer(about 3280ft) what is the percentage grade of that hill? Penny Nom lui répond. 





The orthocentre 
20021017 

Elsie pose la question :
 Find the orthocentre of the triangle with vertices at A(3,4), B(10, 3) and C(3,2).
 Find the distance of point X(3,8) from the line that passes through Y(2, 2) and Z (3, 2).
Chris Fisher lui répond. 





A sale price 
20021015 

Chester pose la question : A jacket is on sale for 32% off. Find the original if the sale price is $89.00 Penny Nom lui répond. 





A million sheets of 30 cm long paper 
20020915 

Jennifer pose la question : if you put a million sheets of 30 cm long paper end to end, how many kilometer long would the paper be from begining to end? Penny Nom lui répond. 





How do start from 2700 and get 35% back out? 
20020909 

Dennis pose la question : 2000 x 0.35 = 700 + 2000 = 2700 How do start from 2700 and get 35% back out? If I have 2700, how do I figure out that 35% of 2000 is 700 and adding the two them together will get me 2700? Penny Nom lui répond. 





Sole Mates Shoes 
20020819 

Robert pose la question : Sole Mates Shoes has expenses of $9,592 per month. What must the store's total income be if it is to make a profit of 12%? Penny Nom lui répond. 





Percentage 
20020720 

Sally pose la question : If 20% of 100 is 80, then why is the percentage difference between 80 and 100 25%. Penny Nom lui répond. 





Two cubes 
20020712 

Vanessa pose la question : The edges of a cube are 50% as long as the edges of another cube. What percent of the volume of the larger cube is the volume of the smaller cube? Peny Nom lui répond. 





A box that holds 22.4 liters 
20020707 

Jon pose la question : How do I find the measurements required to make a box that holds 22.4 liters of something? Penny Nom lui répond. 





Ounces and cubic centimeters 
20020530 

Martin pose la question : How many ounces are in 600cc of liquid? Penny Nom lui répond. 





Conversion of units 
20020429 

Matt pose la question : I am having trouble finding a workable equation for the following problem, particularly the conversion of two systems of measurement. The question states that there are 27 grams of salt in a kilogram of seawater. And it asks how many tonnes (1 tonne = 1000 kilograms) of salt are there in one cubic kilometer of ocean. It also says that the density of seawater is 1.1 g/cm3. What is the equation and how do I figure out how many kilograms there are in a cubic kilometre? Harley Weston lui répond. 





How much of that total is G.S.T? 
20020424 

Darlene pose la question : If I have $1700.00 how much of that total is G.S.T? not 1700.00 + gst ____ + _____ gst = 1700.00 Patrick Maidorn lui répond. 





Ratios 
20020417 

A student pose la question :
 Medication is givin at 1cc. per 20 pounds of body weight. A dog weighs 16 pounds how many ccs. of medication does the dog get?
 Dr. Lee wants you to prepare 1000 ml. of a 10% dextrose solution in lactaed ringers for diuresis or a patient you have a 1 L bag of lactated ringers and 500 ml of 50% dextrose for injection. How would you prpare the solution?
Penny Nom lui répond. 





Calculate profit 
20020413 

Allison pose la question : If I sell something for $75; and my cost is $40, I make $35 profit. How do I calculate the profit percent I made on that transaction? Penny Nom lui répond. 





3 5/8 and 2 1/4 
20020313 

Shirley pose la question : 3 5/8 and 2 1/4 what is the percentage of 2 1/4 to 3 5/8. Penny Nom lui répond. 





My 1978 Chevy has a 350 cubic inch engine 
20020311 

Sharon pose la question : If my 1978 Chevy has a 350 cubic inch engine, about what size engine would that be in liter? Penny Nom lui répond. 





Percentage difference 
20020308 

Tedd pose la question : Can you give me the formulas for calculating percentage differences between two numbers? For example: if the first number is 10 and the second number is 15, then the second number is 50% larger than the first number. However, the formula to calculate that percentage won't work if the first number is greater than the second number as in the following example: The first number is 15 and the second number is 10, with the second number being 33.3% less than the first number. Or maybe I'm mistaken and the same formula will work in both situations. Penny Nom lui répond. 





Percentage 
20020303 

Nathan pose la question : I have two questions:  25% of what number is 195?
 42 is what percent of 112?
Penny Nom lui répond. 





350 students took the math A exam 
20020222 

Jim pose la question : at a high school 350 students took the math A exam. 82% passed the test. 40 students that failed the exam in june, took the exam in August. 70% of this group passed the August test. How many of the original 350 students have passed the exam before september? Paul Betts and Penny Nom lui répond. 





36 is 20% less than _____? 
20020213 

Lori pose la question : 36 is 20% less than _____? Walter Whiteley lui répond. 





Number conversions and averages 
20020203 

A student pose la question : A table has the measurements of 1.6m by 2m, how much material is needed to cover table? I converted to cm then multiplied but got an answer of 32000cm ,so I divide by 100 to get to metres  the answer was 320 which I know is wrong  please explain!! Also I need to explain in my own words what an 'average' is and I am struggling. Penny Nom lui répond. 





50% 
20020115 

Lakarrieh pose la question : 4 is 50% of what number? Penny Nom lui répond. 





8% tax 
20020115 

A student pose la question : total price including tax is $13359.60 8% tax was paid What is the dollar amount of tax paid? Penny Nom lui répond. 





Glasses of wine 
20020110 

A student pose la question :
6 glasses of regular wine (12% alcohol) would equal aprox.? glasses of wine (8% alcohol)
a)9.33 b)8.5 c)7.75 d)9.0 Peny Nom lui répond. 





Nickles, dimes, quarters and fifty cent pieces 
20020108 

A parent pose la question : The total for all coins counted is $4,564.50 The last coin added to the pile is a 50 cent piece There are 8 times as many 50 cent pieces as there are quarters There are 6 times as many dimes as nickles How many of each are there? Penny Nom lui répond. 





All of the Christmas trees are fiftyfive percent off. 
20020108 

A teacher pose la question : All of the Christmas trees are fiftyfive percent off. Madison bought a tree and paid $103.50. Assuming no tax, what was the original price of the tree? Penny Nom lui répond. 





Fractions to decimals and percents 
20011231 

A student pose la question : 2/5 , 4/8 , 4/10 , 3/5 , 6/8 , 7/7 (what is the decimal and percent for each)
1/5 , 1/10 , 1/8 , 1/1 (what is the decimal for each)
100 PERCENT, WHAT IS THE DECIMAL?
The ratio of boys to girls in a class is 1:4. What percent of the class are girls? Penny Nom lui répond. 





A 7% increase 
20011212 

Lorraine pose la question : how do you calculate an old salary if the only information you have is current salary and the percentage increase received. For example if I make $15.86 an hour and I received a 7% increase, how much did I used to make? Penny Nom lui répond. 





83.3% 
20011203 

Ellie pose la question : Please explain how a percentage like 83.3% is changed into a fractions. The answer given is 5/6 and I changed 83.3% to a regular decimal of .833, which would be 833/1000. How do they get 5/6 from that? HELP Chris Fisher lui répond. 





Original value 
20011127 

Lisa pose la question : We are trying to find the original value of a product marked up by 10%. What is the formula to determine the original value? Penny Nom lui répond. 





15 % of 24.95 
20011101 

Puzzled pose la question : How do I take 15% of a number I have forgotten Penny Nom lui répond. 





Metric units 
20011025 

Kelly pose la question : i am helping my kids out with school work and don't remember meters,centimeters decimeters and all those. We have to change meters into cm.....and so on..........is there a place on the web to look for some kind of help in these questions Penny Nom lui répond. 





A $10,00 prize 
20011023 

Michelle pose la question : The grand prize for winning a contest is $10,000. After 28 percent of the prize is deducted for taxes, the winner receives the balance of the prize in annual payouts of equal amounts over a 3year period. How many dollars will the prizewinner receive each year of the 3 years?(Disregard the $ sign when gridding your answer.) Penny Nom lui répond. 





A goat in a square pen 
20011019 

Brad pose la question : A goat is tied to one corner of a square pen 20 ft. on a side.  If the goat's tether is 10 ft. long, what percentage of the grass in the pen can the goat reach?
 What should the length of the tether be so that the goat can reach half of the grass?
Penny Nom lui répond. 





414 is what percent of 5,624? 
20011018 

A student pose la question : 414 is what percent of 5,624? Penny Nom lui répond. 





Column doesn't add up to 100% 
20011017 

A student pose la question : why don't some tables I'm studying in a column add up to 100%? Example: N=338, but responses to questions asked in survey I'm studying equal of 24.3, 9.8, 43.8, DON'T add up to 100%. I'm assuming that some people surveyed out of the 338 didn't bother responding, but is there another problem related to proportion or ratio being used, but improperly labeled on graph?. Note at bottom of table says: "number in parenthesis are numbers of cases" and 338 was in parentheses. I'm lost. Penny Nom lui répond. 





Percentage in our daily lives 
20011008 

Natasha pose la question : What are the uses of percentage in our daily lives? Leeanne Boehm lui répond. 





What percent of the sports drink was drunk by the women? 
20010922 

Rachel pose la question :
 The male track and field athletes drank 153 gallons of sports drink at the meet.
 the track and field athletes drank 255 gallons of sports drink.
 The women track and field athletes drank 102 gallons.
problem: What percent of the sports was drunk by the women? Penny Nom lui répond. 





Investing $5,000 
20010709 

A student pose la question : A principal amount of $5,000 was invested in a savings account for 5 years.The interest earned was $500.Use the simple interest formula to find the annual rate of interest. Penny Nom lui répond. 





Buying a car 
20010606 

Steph pose la question : How do you figure a percent. Say you want to buy a car listed for 21,500. You tell the dealer you want to pay 19,600. The dealer says they'll sell it to you for 20,450. how do you figure what the percent is between 20,450 & 19,600? Penny Nom lui répond. 





A geometry proof 
20010418 

Melissa pose la question : Extend the bisectors of angle A, angle B, and angle C of triangle ABC to meet the circumcircle at points X, Y, and Z respectively. Show that I is the orthocenter of triangle XYZ. Chris Fisher lui répond. 





Percents 
20010404 

Cathy pose la question : This isvery embarassing but since math and specifically percentages was my worst subject in school here goes. If I have a figure such as 425 and that amount represents 10% of the total amount how do I find out what the total amount is? Penny Nom lui répond. 





128 percent too high 
20010404 

A student pose la question : when pilgrims counted noses, they got a count that was 128 percent too high. if they counted 9120 noses, what was the correct count? Claude tardif lui répond. 





66:1 
20010326 

A student pose la question : I need to know how to convert the ratio 66:1 to a percentage. I can not find an answer any where online when the second number is a 1. Penny Nom lui répond. 





Two problems 
20010323 

James pose la question : Casey is a finanical consultant for ABC finance. She earns $456.21 weekly. Her annual group medical coverage costs $1942, of which ABC pays 65%. How much is deducted weekly for medical coverage? and: Eleanor demonstrates microwaves at the national home show. She is paid $7 for each of the first 7 demonstrations and $11 for each demonstration after 7. What is her commission for a day if she makes 12 demonstrations? Penny Nom lui répond. 





Converting percents to decimals 
20010301 

Elliot pose la question : My math question is about Converting Percents to Decimals, here it is Convert 37 1/2 = ? Penny Nom lui répond. 





Solve for two variables 
20010225 

A student pose la question : How do I solve for %1 and %2 in the following formula when T1, T2 and T3 are known? %1 and %2 are ratios of the same element, therefore %1 + %2 = 100%
(%1 x T1) + (%2 x T2) = T3 Penny Nom lui répond. 





Winning percentages 
20010221 

Mike pose la question : TEAM A WINS 55% OF GAMES PLAYED TEAM B WINS 40% OF GAMES PLAYED AGAINST THE SAME OPPONENTS WHAT WINNING PERCENTAGE SHOULD BE EXPECTED WHEN TEAM A PLAYS TEAM B (NEUTRAL SITE)? Harley Weston lui répond. 





Working on commission 
20010217 

Jay pose la question : Ron the realtor is offered a job directly out of realestate school. He has a choice as to which way he will receive his salary the first year.
Salary Plan 1: He would receive a base pay of $2000 per month plus a 3% commission on each sale.
Salary Plan 2: No base pay but a 6% commission on each sale.
Write an equation to determine when it would be better to switch from the first plan to the second plan. Give a one or twosentence answer that includes Ron`s sales in a month. Round to the nearest dollar, if necessary. Leeanne Boehm and Penny Nom lui répond. 





Percentage increase 
20010217 

Bob pose la question : If sales for jan 2001 are 154 vs 105 for 2000  the increase total presented to my office is +46%  how does that compute. Please give me the equation. Penny Nom lui répond. 





percent 
20010211 

A student pose la question : what is 1.5% of 20386.01? Penny Nom lui répond. 





25% mark up 
20010120 

Vivian pose la question : If it costs me $100.00 to manufacture an item and I want to sell it at a 25% mark up, why do I get different answers when I perform the operation the following ways? 1. $100.00 x 25% = $25.00 $100.00 + $25.00  $125.00 2. $100.00 / .75 = $133.334 Should these two not be equal? Penny Nom and Claude Tardif lui répond. 





64.5% profit 
20010112 

Ethel pose la question : IF I PURCHASE AN ITEM FOR $2.00 AND I WANT TO RESELL IT WITH A MARGIN OF GROSS PROFIT OF 64.5% WHAT FORMULA DO I USE TO ARRIVE AT THAT RESELL FIGURE? Penny Nom lui répond. 





30% of 80 
20010103 

Denise pose la question : Could you please tell me what 30% of 80 is? Penny Nom lui répond. 





Calculating the tax 
20001222 

A grocer pose la question : I have a small grocery store. I have a bag of money containing $325. This represents the mornings receipts and a tax of 5.75% is included in the total. How can I separate the gross take from the tax take so that I'll know how much is mine and how much is the state's? Penny Nom lui répond. 





Calculating your grade 
20001204 

Jack pose la question : I got an 80 on test 1 and a 65 on test 2. The first test is worth 35% of our total grade and the second is worth 40%. What is my grade right now? Penny Nom lui répond. 





Two problems 
20001102 

Michael pose la question : Question: I mistakenly divided a number by 5 when I should have multiplied by 5. FInd my percent of error. Next Question: How many odd numbers are between 10 and 9,999 from the digits 09 if each digit is used once per number. Penny Nom lui répond. 





Central Limit Theorem and Law of Large Numbers 
20000626 

Jonathan Yam pose la question : The Central limit Theorem states that when sample size tends to infinity, the sample mean will be normally distributed. The Law of Large Number states that when sample size tends to infinity, the sample mean equals to population mean. Is the two statements contradictory? Paul Betts and Harley Weston lui répond. 





A percentage question 
20000615 

Michael Smith pose la question : I need a percentage for a business plan. How much is onepercent of twohundred and thirtynine million? Penny Nom lui répond. 





Percents with mixed numbers 
20000604 

Julie pose la question : How would you find the percent of 33 1/3 out of 90 by using fraction settup!I can do whole numbers but not mixed. This is how to do whole numbers say it was 33 of 90 33 x 90 = 2970 100 x 1 = 100 2970 divided by 100 the answer is 29.7 so how do you do it with a mixed number Penny Nom lui répond. 





A centroid problem 
20000602 

Kerstin pose la question : An isoceles triangle has sides measuring 13 cm, 13 cm, and 10 cm. Find the distance from the centroid to the vertex of a base angle. Harley Weston lui répond. 





Adjacent Angles 
20000521 

Katherine Keys pose la question : Can a straight angle be an adjacent angle to another angle? Chris Fisher lui répond. 





What percent is one fraction of another fraction? 
20000429 

A student in grade 4 pose la question : What is the method for finding out what percent one fraction is of another fraction. For instance 4/5 is what percent of 1/9? Penny Nom lui répond. 





The weight of a watermelon 
20000425 

Lori Speir pose la question : If I have a 100 pound watermelon and it is 99% water. If it sits out in the sun all day and is now only 98% water what does it weigh now? Penny Nom lui répond. 





42% of 70 
20000407 

Nikkie pose la question : What is 42% of 70? Penny Nom lui répond. 





Wholesale price 
20000402 

Lynda Bintz pose la question : If a product is priced at $4.99 and is marked up 40% how do I calculate the wholesale price? Penny Nom lui répond. 





The world of percentage. Price tags everywhere 
20000327 

Lydia pose la question : I know there is a formula to be utilized for finding the percentage of a number, like most math. You just simply need to remember the formula for finding the number. Please put me on the path. How does one figure out 10% or 15% of a total number asked? Say... 120 Reverse: 15 is what percent of 120, I know the answer should be the same but how is the formula applied? Harley Weston lui répond. 





Increasing the weight 
20000323 

Lee Millard pose la question : A weight of dimension a, b is to have its weight increased by w% by bolting plates of the same material along the top and one side (but not at both ends). The top plate and side plate have the thickness, x. Find the thickness of the plates for a given weight increase of w%. Penny Nom lui répond. 





1000 percent 
20000317 

Matt Stevenson pose la question : If one invests $4000.00 and makes 1000% on the investment would he/she have $40,000.00? Could one figure this by: $4000.00 * 10.0 = $40,000.00? So is 10 times a number the same as 1000%? Would 100 times a number be the same as 10,000%? Penny Nom lui répond. 





Percentages with decimals 
20000206 

Andrew Connell pose la question : I need help with these math questions: How does one convert a percent to a fraction when the percent has a decimal (example86.5%)? Penny Nom lui répond. 





Percent of improvement 
20000130 

Steve Quigg pose la question :
In a 1998 survey, 21% polled responded favorably to a question. In 1999, 31% responded favorably. What is the percent of improvement? Harley Weston lui répond. 





Counting guppies 
20000126 

Sarah Albaugh pose la question : Out of 200 fish, 99% are guppies. How many guppies must be removed to have 98% of the remaining fish to be guppies? Penny Nom lui répond. 





Percentages 
20000109 

Nancy pose la question :
What is the best way for a parent to explain how one calculates percentages? ie. Commission is $54268. Total Sales $403114.00 from that number how do you calculate the percentage of sales of various expenses. Penny Nom lui répond. 





Percentage change 
19991208 

Michael Weinberg pose la question : I am the Laboratory information system supervisor in a hospital. Our computer system calculates the change of specific results to monitor a patient's status. But there is a problem with the calculation in the base code of the program. If one day the patient has a Blood count of 100 (P for Previous) then the next day the Blood count is 75 (C for current), the computer should calculate the change as 25% using the calculation PC/P= D (D for Delta) and then check for positive or negative by the equation If P>C then D*1 or If P The program is calculating using the equation: ((P/C)1)*100 in the above situation this would calculate the Delta as 33.33333% Referenced in a Laboratory manual published before computers were used to calculate the delta changes. . . . Penny Nom lui répond. 





Percent 
19991116 

Elaine Edwards pose la question : Can you please tell me what is 75% of $495.00? Penny Nom lui répond. 





Percentage increase 
19991003 

Ann Allen pose la question : I am a a student in the 12th grade. I need to know how to calclulate the following: A percentage increase from 2.0% to 9.5% is what percentage? Harley Weston lui répond. 





Percentages 
19990923 

Pete Cornejo pose la question : Hello, I was wondering if you could help me with a question? Yesterday my daughter came to me and asked if I could help her solve these three problems.  18 percent of 25 is what?
 18 percent is what of 25?
 25 is what percent of 18?
Walter Whiteley lui répond. 





Predictions 
19990922 

Joesph Dana pose la question : How do u find the results of an unbiased sample of 100 students that are shown on the table. For example the school has a total of 1,150 students prdict how many students would chose cereal(46) pancakes(15) eggs(20) and sandwich(19) Haeley Weston lui répond. 





Fractions, percents and decimals 
19990919 

Sue Farr pose la question : My son is in 5th grade, and I can't seem to find any papers that have a simple explanation of how to convert decimals into fractions, percents into decimals, and viceversa. Harley Weston lui répond. 





How many went to the game? 
19990909 

Lisa Schmidt pose la question : If 3/4 more students went to the game than actually did go to the game, 25% of all students in the entire school would have gone. What fraction of students in the entire school went to the game? Harley Weston lui répond. 





RePercentaging 
19990515 

Doug Guion pose la question : My mind has gone blank. I have a series of percentages which have been establised by the same base number. I need to remove one of the percentages (13%) leaving me with 87%. I need to arifically inflate the remaining percentages to total 100%. Any help would be appreciated. Penny Nom lui répond. 





Ounces and milliliters 
19990417 

Tony Rizzi pose la question : I'm mixing a formula of: 48 oz distilled water. 15 grams of Hydroxy Ethyl Cellulose GR (powder) 30 grams of Hydroxy Ethyl Cellulose MR (powder) 200 grams of Barium Sulfate (powder) 1000 grams of Calcium Hydroxide (powder) After mixing, I need to estimate the amount of each ingredient that fits in a 3ml syringe. And how many syringes I can fill? Harley weston lui répond. 





Converting Metric Measurements 
19990408 

Rick pose la question : Do you have any simple explanations for converting Metric measurements to other Metric measurements?? What helpful hints do you also have for a 5th Grader... Penny Nom lui répond. 





Percentages 
19990316 

Beth Barton pose la question : If I have two figures and want to know the difference between them, in Percentage, how do I proceed with a calculation? Example: 67,800  56,000 = 11,800 What percentage does this difference represent? Jack LeSage lui répond. 





Metric Conversion 
19990307 

TDestra pose la question : Please help to answer this question: Is a cubic centimeter equivalent to milligrams or milliliters, and how many? Also, is it a liquid measure? Penny Nom lui répond. 





Converting mm's to inches 
19990222 

Paul White pose la question : It has been a long time since high school and I do not remember how to convert mm to inches. Could you please tell me what this would convert to in inches? 210 X 254 mm. Chris Fisher lui répond. 





Percentage markup 
19981128 

John Coffey pose la question : My 11th grade daughter asked me how to calculate retail mark up percentages, I would appreciate any help with this question. Penny Nom lui répond. 





Two sides and a bisectrix. 
19981111 

Victor Grinshtein pose la question : I am looking for someone who can tell me how to construct a triangle by 2 sides and a bisectrix using a compass and a ruler. Chris Fisher lui répond. 





Centimetres 
19981111 

Vicky Caldwell pose la question : I work in Carpet Manufacturing and I need to know how to figure the calculation for a roll of carpet in centimeters. For example: a 12 x 100 roll of carpet equals 133.34 square yards, which is 100 linear ft. and 1,200 square foot. Can you please tell me how I would figure to get CENTIMETERS??????? Jack LeSage lui répond. 





Nickles on the Highway 
19980922 

Ronnie Mac Donald pose la question : How many nickels would it take to cover 226km of highway,each nickel is 2cm in diameter? Penny Nom lui répond. 





Volumes 
19980829 

Lorraine Wall pose la question : Consider the region in the first quadrant bounded by the x and y axes, the vertical line x=3 and the curve y = 1 / (x squared + 3). Determine the volume of the solid by rotating this region about the xaxis. Now that is the first part. I then have to find the coordinates of the centroid of the solid by rotating this region about the xaxis. Thanks. Lorraine Harley Weston lui répond. 





Percentages 
19980710 

Adam pose la question : Hi, I would like to know the basics of percentages. It is all rather confusing to me.I have excelled in math but want to be ready next year for more advanced math. What is Percentages? Penny Nom lui répond. 





Percentage Question 
19980518 

Eddie Knox pose la question : Example: If I have a recipe calling for 16 ounces of 4% vinegar (vinegar which has been diluted with water to a strength of 4%), and all I have on hand is 16 ounces of 5% vinegar, how much water should I add to decrease the strength to 4%, before measuring the 16 ounces to be used. I'll appreciate any insight and help. Thank you so much! Harley Weston lui répond. 





A Monte Carlo Procedure 
19970423 

Donna Hall pose la question : A irregularly shaped object of unknown area A is located in the unit square 0<=x<=1. Consider a random point uniformly distributed over the square. Let X = 1 if the point lies inside the object and X = 0 otherwise. Show that E(X) = A. How could A be estimated from a sequence of n independent points uniformly distributed over the square? How would you use the central limit theorem to gauge the probable size of the error of the estimate. Harley Weston lui répond. 





The Central Limit Theorem 
19970421 

Donna Hall pose la question : A skeptic gives the following argument to show that there must be a flaw in the central limit theorem: We know that the sum of independent Poisson random variables follows a Poisson distribution with aparameter that is the sum of the parameters of the summands. In particular, if n independentPoisson random variables, each with parameter 1/n, are summed, the sum has a Poisson distributionwith parameter 1. The central limit theoren says the sum tends to a normal distribution, butPoisson distribution with parameter 1 is not normal. What do you think of this argument? Neal Madras lui répond. 





The normal distribution. 
19970321 

Donna D.Hall pose la question : I am looking for a proof for the normal distribution. I suppose "proof" was not a good choice of words. What I am looking for is a way to "derive" the normal distribution in simple terms so that the most average teenager can see the logic. Can you help me? Harley Weston lui répond. 

