How do you add tax to a price?

Answer 1

If the tax is 10 percent and the price of the item is $1.00 then you simply calculate 10% of 1.0. = 10 cents and add it to the original price.

You would charge the person $1.10 (including tax).


The simple way to calculate the final price mathematically is to express the percent as a decimal and add 1 to it. Then multiply the price by this number.

I.e If the tax is 5.6% you would express this a 0.056 + 1 = 1.056 and multiple the pre tax price by this number.

Answer 2

First you calculate the tax, then you add it. If the tax is, for example, 5%, you calculate price x 5 / 100 to get the tax amount.