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mrtw= 920g
Cp= 20%
Szukane:
ms= ?
/- jako kreska ułamkowa
Za pomocą proporcji:
920grtw/xgs = 100grtw/ 20gs
920*20 = x*100
18400 = 100x
x= 18400/100 =184 g
albo wzoru
20%*920 / 100 = 18400/100 = 184g