1) 1% = 20/100=0.2
5/0.2=25%
2.) 1%= 80/100=0,8
12/0,8=15%
1%= 75/100=0,75
15/0,75=20%
1%=3,2/100=0,032
4,8/0,032=150%
1%=30/100=0,3
9/0,3=30%
3)1%=20/100=0,2
9/0,2=45%
1%=20/100=0,2
13/0,2=65%
1%=5/100=0,05
1,6/0,05=32%
1%=3,5/100=0,035
7/0,035=200%