15/21 Simplified

The fraction 15/21 written in its simplest form.

15/21 in simplest form

5/7

= 0.714286 as a decimal · 71.4286% as a percentage

How it works

To reduce a fraction, divide the numerator and denominator by their greatest common factor (GCF).

So 15/21 = 5/7, which cannot be reduced further because 5 and 7 share no common factor other than 1.

15/21 = 5/7 = 10/14 = 15/21 = 20/28 — all equal to 0.714286.

The fraction calculator adds, subtracts, multiplies, divides and simplifies any fractions.

What is 15/21 in simplest form?+

15/21 simplifies to 5/7. Both the numerator and denominator share a greatest common factor of 3, and dividing each by 3 gives 5/7.

How do you simplify 15/21?+

Find the greatest common factor (GCF) of 15 and 21, which is 3, then divide the top and bottom by it: 15 ÷ 3 = 5 and 21 ÷ 3 = 7, giving 5/7.