Răspuns :

ms=250g

c1=8%

ms2=ms1+2,3

md2=md1+2,3g

c2=?

c/100=md/ms

8/100=md/250

md=8×250/100

md=2000/100

md=20g

md2=md1+2,3g

md2=20+2,3g

md2=22,3g

ms2=252,3

c2/100=md2/ms2

c2/100=22,3/252,3

c2=100×22,3/252,3

c2=2230/252,3

c2=8,83%

Sper ca te-am ajutat!