1/8:1/4 1/4:4/5 8/9:4/21 1/6:1/2 1/3:1/6 3/7:6/7

Question

1/8:1/4
1/4:4/5
8/9:4/21
1/6:1/2
1/3:1/6
3/7:6/7

Answer 1

1/8*4/1=1/2
1/4*5/4=5/16
8/9*21/4=32/189
1/6*2/1=1/3
1/3*6/1=2/1=2
3/7*7/6=1/2