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In 400 grame solutie se gasesc 80 grame zahar. Ce concentratie procentuala are solutia ?


Răspuns :

ms=400g
md=80g
_________
c=?
_________
[tex]c = \frac{md}{ms} \times 100 \\ c = \frac{80}{400} \times 100 \\ [/tex]
c=20%