Greatest Common Factor (GCF) Calculator

GCF example

Find GCF for numbers 8 and 12:

The prime factors of 8 are:

8 = 2×2×2

The prime factors of 12 are:

12 = 2×2×3

So the common prime factors of 8 and 12 are:

gcf(8,12) = 2×2 = 4

So 8/12 fraction, can be reduced to 2/3:

8 / 12 = (8/4) / (12/4) = 2 / 3