oblicz
a) 75% liczby 130
b) 150% liczby 640
100%-130
75%-x
x=75*130 /100 =97,5
100%-640
150%-x
x=150*640 /100=960
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100%-130
75%-x
x=75*130 /100 =97,5
100%-640
150%-x
x=150*640 /100=960