# 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.

## Simplifying 8/21 step by step

**1**. So this is already the simplest form of the fraction. So we cannot simplify this further.

### 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).

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.