Datele problemei:
mapa = 200g
msol1 = 300g
c1 = 40%
c2 = ?
md constant!!!
====================
Aflu mai intai md cu ajutorul lui c1 si msol1
c1 = md*100/msol1 => md = c1*msol1/100 = 40*300/100 = 120g
Si acum calculez c2
c2 = md*100/msol2 = md*100/(msol1+mapa) = 120*100/(300+200) = 12000/500 = 24%