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kobiety - 15
razem - 40
100% - 40
x - 15
x= 100% x 15 : 40
x= 37,5 %
Odp. Kobiety stanowiły 37,5 % zebranych.
25+15=40
40-100%
15-x%
x=15*100/40=37,5%
Odp.: Kobiety stanowiły 35,5%.