This is where you will learn how to calculate twenty-one minus one percent (21 minus 1 percent). We will first explain and illustrate with pictures so you get a complete understanding of what 21 minus 1 percent means, and then we will give you the formula at the very end.

We start by showing you the image below of a dark blue box that contains 21 of something.

21

(100%)

1 percent means 1 per hundred, so for each hundred in 21, you want to subtract 1. Thus, you divide 21 by 100 and then multiply the quotient by 1 to find out how much to subtract. Here is the math to calculate how much we should subtract:

(21 ÷ 100) × 1

= 0.21

We made a pink square that we put on top of the image shown above to illustrate how much 1 percent is of the total 21:

The dark blue not covered up by the pink is 21 minus 1 percent. Thus, we simply subtract the 0.21 from 21 to get the answer:

21 - 0.21

=

**20.79**

The explanation and illustrations above are the educational way of calculating 21 minus 1 percent. You can also, of course, use formulas to calculate 21 minus 1%.

Below we show you two formulas that you can use to calculate 21 minus 1 percent and similar problems in the future.

**Formula 1**

Number - ((Number × Percent/100))

21 - ((21 × 1/100))

21 - 0.21

=

**20.79**

**Formula 2**

Number × (1 - (Percent/100))

21 × (1 - (1/100))

21 × 0.99

=

**20.79**

**Number Minus Percent**

Go here if you need to calculate any other number minus any other percent.

**22 minus 1 percent**

Here is the next percent tutorial on our list that may be of interest.