What is the step method to find gcf of 28 and 42

First, try multiplying multiple numbers to see if you get these numbers.

2=4,6,8,10,12,14,16,18,20,22,24,26, (28),30,32,34,36,38,40, (42)

7=7,14,21, (28),35, (42)

14 = 14, (28), (42)

14, would be best; Alternatively, the GCF of 28 and 42 can be found using the prime factorization of 28 and 42.

-The factors of 28 are 28, 14, 7, 4, 2, 1.

-The factors of 42 are 42, 21, 14, 7, 6, 3, 2, 1.

Common numbers: 1, 2, 7,14, the largest number that can go into both is 14.