=3: 1 1

5:0.45=(5* 100):(0.45* 100)

=500:45

=(500/5):(45/5)

= 100:9

1/7: 1/3=( 1/7×2 1):( 1/3×2 1)

=3:7

5/8: 1/4=(5/8×8):( 1/4×8)

=5:2