If I have \$1700.00 how much of that total is G.S.T? not 1700.00 + gst ____ + _____ gst = 1700.00 how do I get that answer Please Thank you Darlene Hi Darlene, the answer depends on wether the price also includes PST. I will use a different amount in the example below, but you can easily adjust it to fit your own figures: If you only have G.S.T, which is 7%, then you would calculate the price after taxes by multiplying by 1.07. So a \$200 item would cost 1.07 x \$200 = \$214 after G.S.T. To calculate how much G.S.T. was paid on a \$214 item, simply reverse the calculation by dividing by 1.07, as \$214/1.07=\$200. The total GST paid on this \$214 item was hence \$14. This changes if you have both PST and GST. In Saskatchewan, PST is 6%, so the total tax on an item is 13%. A \$189.38 item would also cost \$214 after PST and GST. (multiply by 1.13) How much was the GST on this \$214 item? First, calculate the original price of the item by dividing by 1.13 (the total tax), to get back \$189.38. Now calculate the 7% tax on that price, to get \$13.26. Hence on this \$214 item (same price as above!), the GST was \$13.26. I hope this helps, Patrick Go to Math Central