GCF of450 and 735

Answer 1

In order to find GCF, you need to find all the prime factors that go into both numbers.

450: 2 * 3 * 3 * 5 * 5

735: 3 * 5 * 7 * 7

Now, look at the prime factors that they each have in common: one 3 and one 5.

Multiply those and you have the GCF: 3 * 5 = 15