How do you find the greatest common factor of 54, 45?

1 Answer
Nov 30, 2016

Answer:

54 = 2 * 3 * 9, and 45 = 5 * 9. The greatest common is 9.

Explanation:

  1. List the prime factors for both numbers.
  2. Multiply the factors both have in common; if there are non the GCF is 1.