Write the ratio in the simplest form.

45 : 15

A. 9 : 3

B. 3 : 1

C. 1 : 3

D. 4 : 1

Simplest form of the ration 45 : 15 can be solved by dividing the both number by there greatest common factor. So the greatest common factor of 45 = (15 x3 and 15 = (15 x 1) so 15 is the greatest common factor. 45 / 15 = 3 and 15/15 = 1 so the ratio 3 : 1