Step 1

Given: 12 and 28

Step 2

The prime factorization of 12 and 28 is

\(\displaystyle{12}={2}^{{{2}}}\times{3}\)

\(\displaystyle{28}={2}^{{{2}}}\times{7}\)

Therefore, the least common factor of 12 and 28 is \(\displaystyle{2}^{{{2}}}\times{3}\times{7}={84}\)

Given: 12 and 28

Step 2

The prime factorization of 12 and 28 is

\(\displaystyle{12}={2}^{{{2}}}\times{3}\)

\(\displaystyle{28}={2}^{{{2}}}\times{7}\)

Therefore, the least common factor of 12 and 28 is \(\displaystyle{2}^{{{2}}}\times{3}\times{7}={84}\)