se amesteca 3g zahar + 300g apa c%=?

Răspuns :

md= 3g

m apa= 300g

C%=?

ms = md+ m apa

ms = 3g + 300g

ms = 303g

C= md × 100 / ms

C = 3g× 100 / 303 g

C = 0,99 %