There are several ways

You could multiply to get a common denominator: 6/4 and 6/5 = 30/20 and 24/20

You could use a calculator: 6/4 and 6/5 = 1.5 and 1.2

You could multiply to get a common denominator: 6/4 and 6/5 = 30/20 and 24/20

You could use a calculator: 6/4 and 6/5 = 1.5 and 1.2