Question

2/5 -2/15
7/4-13/10
4/7-5/8
5/12-7/18
2/10-5/25
32/100-6/20

Answer 1

2/5 - 2/15 =
mmc = 15
( 6 - 2)/15 = 4/15 ***
b
7/4 - 13/10 =
mmc = 20
( 35 - 26)/20 = 9/20 ***
c
4/7 - 5/8 = 
mmc = 56
( 32 - 35 )/56 = 3/56 ***
d
5/12 - 7/18
mmc = 36
( 15 - 14)/36 = 1/36 ***
e
2/10 - 5/25 =
mmc = 50
( 10 - 10)/50 = 0/50 = 0 ****
f
32/100 - 6/20
mmc = 100
( 32 - 30)/100  = 2/100 = 1/50 ***