1%=1:100=0,01
6%=6:100=0,06
10%=10:100=0,1
25%=25:100=0,25
50%=50:100=0,5
75%=75:100=0,75
120%=120:100=1,2
170%=170:100=1,7
======================
2%=2/100=1/50
5%=5/100=1/20
20%=20/100=1/5
60%=60/100=3/5
80%=80/100=4/5
140%=140/100=7/5
180%=180/100=9/5