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60-100%
6=10%
3=5%
24:3=8
8*5=40%
24=40%
84 - x
60 × x
--------
84 × 100%
x = 40%
odp wzrosla o 40 %
84-x%
x=(100razy84)/60
x=8400/60
x=140
140-100=40%
odp:liczba członków wzrosła o 40%