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# Calculating the Remainder When 21 is Divided By 7

## Introduction

Division is an important part of mathematics. It enables us to calculate how many times one number can be divided into another. It is also useful for breaking down complex numbers into simpler ones. In this article, we will look at the process of finding the remainder when 21 is divided by 7.

## How to Calculate the Remainder

To calculate the remainder when 21 is divided by 7, we first need to divide 21 by 7. This can be done by dividing 21 by 7 and then multiplying the answer by 7.

21 divided by 7 = 3

3 multiplied by 7 = 21

Now that we know our answer, we can calculate the remainder. The remainder is the amount of the number that is left over after the division. This is calculated by subtracting the answer from the original number.

21 minus 21 = 0

The answer is 0. This is the remainder when 21 is divided by 7.

## Conclusion

Division is an important part of mathematics. We can use it to break down complex numbers into simpler ones. In this article, we looked at the process of finding the remainder when 21 is divided by 7. The answer is 0.