Question

Name three common denominators of 1/4 and 1/5

A 10, 20, 30

B 2, 3, 5

C 20, 40, 60

D 5, 10, 15

Answer 1

The answer is C.
20: 4•5=20 5•4=20
40: 4•10=40 5•8=40
60: 4•15=60 5•12=60
Hope this helps!