# Simplifying 8/21

### How to reduce 8/21 to its simplest form

To simplify 8/21 we have to divide both numerator (8) and denominator (21) by their greatest common factor (GCF). In other words, writing a fraction in its simplest form means that both numerator and denominator can no longer be divided by the same whole number other than 1.

## Result simplifying 8/21

8
21
=
8
21
Greatest Common Factor (GCF): 1

## Simplifying 8/21 step by step

8
21
1
Find the greatest common factor of 8 and 21
To simplify a fraction, look for the greatest common factor of the numerator and the denominator. The greatest common divisor of 8 and the 21 is 1. So this is already the simplest form of the fraction. So we cannot simplify this further.
8
21
=
8
21

### Simplify fractions

If a fraction is not yet in its simplest form, you can rewrite (reduce) it into a fraction where numerator and denominator are as small as possible. Try our simplified fraction calculator to simplify your fractions and find the greatest common factor (GCF).

Simplify fraction calculator

A fraction is irreducible (in its simplest form) when the numerator and denominator have no common factors other than 1. In that case the greatest common factor is 1.