How do you Find the Greatest common factor of 12t and 18t?

The factors of 12 are:

1, 2, 3, 4, 6, 12

The factors of 18 are:

1, 2, 3, 6, 9, 18

The common factors are:

1, 2, 3, 6

The Greatest Common Factor:

GCF = 6

The GCF of t and t is t.

The GCF of 12t and 18t is 6t.