proszę o pomoc
zad w załączniku

a)
10% = 1/10
40% = 4/10 = 2/5
80% = 8/10 = 4/5
b) 30% = 3/10
60% = 6/10 = 3/5
90% = 9/10
c)
5% = 5/100 = 1/20
15% = 15/100 = 3/20
55% = 55/100 = 11/20