![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Method 1:
\List the factors of each number.
\Factors of 12: 2, 3, 4, 6.
\Factors of 8: 2, 4, 8.
\Identify the greatest common factor.
\The greatest common factor of 12 and 8 is 4.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step2.JPG\")
Method 2:
\Write the prime factorization of each number.
\12 = 2 × 2 × 3.
\8 = 2 × 2 × 2.
\The GCF is the product of the common prime factors in each number.
\GCF = 2 × 2 = 4.
\The greatest common factor of 12 and 8 is 4.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The greatest common factor of 12 and 8 is 4.