12
12
20
If you cant find a common denominator for two numbers you multiply them together which in this case would be 72 then you just symplify.
24 is.
15
28
4/7 and 3/5 have an LCD of 35 since they 7 and 5 have no common factors.
30 just30
The LCD of 3/4, 4/5 and 2/3 is 60.
The LCD of 3/4, 4/5 and 2/3 is 60.
16
if you have a common denominator, the answer will remain the number that the common denominator is. like say the fraction is 3/4-2/4 (three over four minus two over four), the answer would be 1/4 (one over four)