Simplest form answer

15/21 Simplified = 5/7

The simplified form of 15/21 is 5/7. The GCF is 3, the decimal is 0.7143..., and the percent is 71.4286...%.

Simplified

5/7

Decimal

0.7143...

Percent

71.4286...%

Step-by-step GCF reduction

1. Find the greatest common factor.

The GCF of 15 and 21 is 3.

2. Divide the numerator and denominator by the GCF.

15 ÷ 3 = 5

21 ÷ 3 = 7

3. Write the result.

15/21 simplified is 5/7.

Decimal equivalent

5/7 = 0.7143...

Percentage equivalent

5/7 = 71.4286...%

71.4286...%

The filled part represents 5/7 of one whole.

Use the main fraction simplifier for any numerator and denominator.