Greatest common factor (GCF) calculator. Is also known as greateset common divisor (GCD).
Find GCF for numbers 8 and 12:
The divisors of 8 are:
8 = 2×2×2
The divisors of 12 are:
12 = 2×2×3
So the common divisors of 8 and 12 are:
gcf = 2×2 = 4
So 8/12 fraction, can be reduced to 2/3:
8 / 12 = (8/4) / (12/4) = 2 / 3