







Formula when i know the GST total 
20171031 

Duncan pose la question : HI  I've added up the GST from a pile of receipts and would like to know what the total cost of goods would be without GST. I don't want to add up 100's of receipts again with the cost before GST but I do need this total cost.
i.e.) I know I paid $400 GST, what would the formula be to find out the cost of what I purchased before taxes? Your help is much appreciated! Penny Nom lui répond. 





formula when i know the GST total 
20171031 

Duncan pose la question : HI  I've added up the GST from a pile of receipts and would like to know what the total cost of goods would be without GST. I don't want to add up 100's of receipts again with the cost before GST but I do need this total cost.
i.e.) I know I paid $400 GST, what would the formula be to find out the cost of what I purchased before taxes? Your help is much appreciated! Penny Nom lui répond. 





Sales tax 
20150505 

Adalyn pose la question : Hello i've been having some trouble with math, The question is asking for a GST
and a PST
of a 30.00 dollar shirt. I don't know how to find the GST or the PST please help Penny Nom lui répond. 





Twotiered GST system 
20150314 

Ruby pose la question : This question showed up in one of my Math assignments and nothing on the internet seemed to help me find a way to calculate it.
A certain country has a twotiered GST system. For the first $1500 of any item, GST is levied at 10% and any amount over $1500 is levied at 15%.
Determine the amounts that give the following GSTs.
a) $350
b) $780 Penny Nom lui répond. 





The amount of GST 
20140122 

ken pose la question : I am trying to find out what was the amount of the GST that was added in $2,319.45
Ken Penny Nom lui répond. 





HST, PST and GST in Ontario 
20131205 

Don pose la question : I have a HST total. I need the HST amount brokendown to a PST
and GST amount for Ontario. Harley Weston lui répond. 





GST and PST 
20131014 

Janine pose la question : 450.00 x 8% gst and 450.00 x 13% pst 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. 





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. 





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 is the 5% GST 
20101127 

Louise pose la question : I am doing our business books and could you please tell me how to
figure out how to calculate what the 5% GST would be on a total.
Such as in example.....$78.79 total figure.....what would be the GST
portion. How do you figure it out. ??
Thanks Stephen La Rocque lui répond. 





Sales taxes in Quebec 
20100428 

carole pose la question : I work at a company where we use transport companies and we often get credits
on their invoices. I need to know how to subtract the sales taxes from these credit amounts.
(5% TPS and 7.5% TVQ).
Is the equation: Amount / 1.05 = then this amount / by 1.075=? Penny Nom 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. 





GST and PST 
20100324 

z pose la question : Hello math Central,
What is the math formula and method I can use, IN 1 STEP to extract ONLY both(pst/gst) & or gst TAXES from the total sale/purchase? Harley Weston lui répond. 





GST and PST 
20091130 

anne pose la question : i have a total amount15.81.i need to find out the amount of gst(5%) and the pst(7%) that i paid within that amount of 15.81 Penny Nom lui répond. 





The taxable part of an invoice 
20090825 

Carol pose la question : Question from CAROL:
THE INVOICE TOTAL IS 2731.90 BUT IT DOES NOT SHOW WHAT THE NET AMOUNT IS
THAT THE STATED GST OF 121.90 IS. HOW DO I CALCULATE THE NET AMOUNT THAT
THIS GST AMOUNT REFERS TO? Harley Weston 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. 





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. 





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. 





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. 





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. 





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. 





What is the GST component? 
20080611 

Jilly pose la question : I need to find a quick and easy formula for finding the gst (10%) of the total amount in $ terms, eg: the total is $500 what is the gst component? 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. 





The 5% GST 
20080206 

Lydia pose la question : If I buy a book of $89.00 and my GST is 5% what will my total come out to?
Thanks!! Penny Nom 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. 





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. 





What is the taxable amount? 
20071002 

Mark pose la question : If I know the amount of GST or PST collected is there a calculation to find out what the taxable amount was.
eg. 1.50 GST collected. GST is 6%. What is the taxable amount.
eg. 2.00 PST collected. PST is 8%. What is the taxable amount. Stephen La Rocque 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. 





Calculating sales taxes 
20070711 

Tonya pose la question : Hi, Im having trouble calculating GST and PST
I know that in this province, GST is 6% and PST is 7%, I have a total of $275, and GST is 0.06, and PST is 0.07, so do I add those two and multiply them by the total, $275? 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. 





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. 





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. 





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. 





pst and gst 
20030624 

Robin pose la question : I need to find an easy solution to remembering how to calculated the gst and pst once I have the total amount. ex: my total is $154.40, I have to find the gst and then the pst. I live in bc so the taxes are 7% for gst and 7.5% for pst. Penny Nom 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. 

