ms1 = 75g
md = 5g
c1 = 2%
c2 = ?
==============
Aflu md1 cu ajutorul la c1 si ms1
- c1 = md1*100/ms1 => md1 = c1*ms1/100 = 2*75/100 = 1,5g
Si acum calculez c2 stiind ca md2 = md + md1 si ms2 = ms1 + md
- c2 = md2*100/ms2 = (md1+md)*100/(ms1+md) = (1,5+5)*100/(75+5) = 6,5*100/80 = 8,125%
