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2014-11-05T20:59:03+02:00
C=15%
ms=200g
c= \frac{md}{ms} ×100⇒15= \frac{md}{200} ×100= \frac{md}{2} ⇒md=15×2=30g
c= \frac{md}{ms} ×100= \frac{30}{350} ×100= \frac{3}{7} ×20= \frac{60}{7} =8,(571428)%