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50% z 50% z 50 = 50% z 25 = 12,5
tą niewiadomą obliczam z proporcji:
12,5 - 15%
x - 100%
x= 100%*12,5/15%
x= 1250 / 15
x = 83, (3)
x- 50%
x= 25
25-100%
x- 50%
x= 12,5
12,5- 15%
x- 100%
x=83, (3)
25%z50=12.5
150%=125
50%=41
100%=84