If something costs $21 and is on sale for 40% off, then how much would it cost? Here we will show you how to calculate how much you save (discount) and how much you have to pay if something you want to buy is regularly $21, but is currently on sale for 40 percent off.
There are many ways of calculating your discount and final purchase price. One way is to multiply 21 dollars by 40 percent, and then divide the answer by one hundred, then deduct that result from the original price. See illustration below:
(21 x 40)/100 = $8.40
21 - 8.40 = $12.60
Thus, a product that normally costs $21 with a 40 percent discount will cost you $12.60, and you saved $8.40.
You can also calculate how much you save by simply moving the period in 40.00 percent two spaces to the left, and then multiply the result by $21 as follows: $21 x .40 = $8.40 savings.
Furthermore, you can get the final price by simply deducting .40 from 1 and multiplying it by $21 as follows: (1 - .40) x $21 = $12.60 final price.
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