If the know the total price of an item, including tax, how do you calculate the pre-tax amount?

Question

if the tax rate is set, lets say 14%?

Answer 1

Let t=tax rate in percentage. Then the after tax cost (atc) is

atc=ptc(1+t/100) where ptc = pretax cost.

therefore ptc = atc/(1+t/100)

For example suppose the tax is 14% and the ptc is $5

then atc = $5 x 1.14 = $5.70

If the atc = $10

then ptc = $10/(1.14) = $8.77

By the way, answers 2 and 3 are wrong. Suppose ptc = $86. 14% of 86 = 86 x 0.14 = 12.04 and atc = 98.04 which is not 100. If atc = 100 then ptc = 100/(1.14) = 87.72. Check: 14% of 87.72 = 12.28. 87.72+12.28 = 100.

Answer 2

If the tax is 14%, here's an example

Your total purchase was $100 including tax and you want to find the amount before tax, so you would first multiply 100 by 0.14 (14% in decimal form). Next, you would take the answer from that multiplication and subtract it from the total amount ($100)

$100 x 0.14 = $14

$100
- $14
--------
$86

$86 was the cost of the purchase before tax.

I hope this helps.

Answer 3

you divide the total by .14 and then you subtract that amount from the overall total and you get ur answer

Answer 4

Divide the total by the percentage and that will give you the pretax rate

Answer 5

subtract 14% from the total.