What is 20 Percent off 21 Dollars?

What is 20 Percent off 21 Dollars? - 20% off $21 is $16.80. If an item is on sale for 20% off from the original price of 21 dollars, you would pay $16.80 with a discount of $4.2.

What is 20 Percent off 21

Following is the percentage formula on how to calculate what is 20 percent off a price.
Percent Off = (100-Number1)/100 * Number2

plugin the above numbers to the percentage formula and we get
(100-20)/100*21 = 16.80