Răspuns :
16%......................50lei
100%......................x lei
____________________
x= 100x50/16
x=312,5 lei
100%......................x lei
____________________
x= 100x50/16
x=312,5 lei
x-suma initiala
16% din x= 16/100*x= 4/25*x= 4x/25
4x/25=50
x=25*50/4
x=25*12,5
x=312,5 lei -suma initiala
16% din x= 16/100*x= 4/25*x= 4x/25
4x/25=50
x=25*50/4
x=25*12,5
x=312,5 lei -suma initiala