1/2=0.5
1/4=0.25
3/4=0.75
1/5=0.2
2/5=0.4
3/5=0.6
4/5=0.8
1/8=0.125
3/8=0.375
5/8=0.625
7/8=0.875
1/10=0.1
3/10=0.6
7/10=0.7
9/10=0.9
1/20=0.05
3/20=0.15
7/20=0.35
9/20=0.45
11/20=0.55
13/20=0.65
17/20=0.85
19/20=0.95
1/25=0.04
2/25=0.08
3/25=0.12
4/25=0.16
6/25=0.24