find two numbers, both smaller than 100, that have common multiple of 450 and highest common factor of 15

hello:

90 = 15*6

75 = 15 * 5

highest common factor of 90 and is 15 because highest common factor of 5 and 6 is 1

90 = 3² * 2*5

75 = 5^3

common multiple of 90 and 75 is : 3²*2*5² = 450

90 and 75 both smaller than 100.