S-t(s-b)-(1-t)rex+w
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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.
First you calculate the amount of the tax on the item. Then you add together the original cost of the item and the tax.
You have to calculate 400,000 x 1.5 / 100. (Percent means hundredths; the idea is to calculate 1.5 hundredths of the amount.)
You multiply the purchase price (without sales tax) by 13/100, that is, by 0.13.
Multiply the price by 0.015