Answer:
find the common denominator for all.
and turn into equivalent fractions
so let's say common denominator in this instance is 300 whatever you do to bottom must be done to the top.
4 X 75 =300
3 X 75 = 225
225/300
6 X 50 = 300
5 X 50 = 250
250/300
25 X 12 = 300
16 X 12 = 192
192/300
15 X 20 = 300
9 X 20 = 180
180/300
A)225/300 B)250/300 C)192/300 D)180/300
answer= D, C, A, B