7/30 = x/90
x=7×90/30
x=21
7/24=x/120
x=35
7/25=x/100
x=28
3/40=x/160
x=12
5/16=x/64
x=20
5/12=x/60
x=25
4/15=x/75
3/8=x/72
x=27
7/30 = x/90
x=7×90/30
x=21
7/24=x/120
x=35
7/25=x/100
x=28
3/40=x/160
x=12
5/16=x/64
x=20
5/12=x/60
x=25
4/15=x/75
x=20
3/8=x/72
x=27