4)
2000 ...................100 %
x......................40 %
y.....................55%
------------------------------
x=(2000*40)/100=800 lei
y=(2000*55)/100=1100
2000-800-1100=100 lei
5)
100 %-35%=65%
195...........65%
x................100 %
-----------------
x=(195*100)/65=300 kg
6)
15 %+100%=115%
115%...............69
100%..........x
-----------------
x=(69*100)/115=60 copii
