~ms1=50g; c1=10%; ms2=200g; c2=30%.......c3=?
~50g.....md1
100g....10g
=> md1=(50*10)\100=5g
~200g...md2
100g...30g
=>md2=(200*30)/100=60g
~ms3=ms1+ms2=250g
md3=md1+md2=65g
~250g.....65g
100g.....c3
=>c3=(100*65)/250=26g
Am facut cu regula de 3 simpla si am pus "~" ca ii altceva, adica alt rand