A student got 15 questions correct on a math test. If their score was 75%, how many problems were on the test?
75% = 75 / 100 = 0.75
15 / 0.75 = 20
OR
75 % = 3 / 4
15 / ( 3 / 4 ) = 15 • 4 / 3 = 60 / 3 = 20
15 / 0.75 = 20
OR
75 % = 3 / 4
15 / ( 3 / 4 ) = 15 • 4 / 3 = 60 / 3 = 20