Question

dupa o scumpire de 16% urmata de o reducere de 10% un obiect are pretul 302,76 lei. Pretul initial era de ...lei?

Answer 1

Notam pret cu P
P+P*16/100=S
S-S*10/100=302.76 => S-S/10=302.76=>9S=3027.6
S=336.4
116P=100*336.4
P=290

Answer 2

y*90/100 =302.76  ;   y =302.76*100/90 =336.4
x*116/100 =336.4  ;    x =336.4*100/116 =290 lei pret initial
(100-10=90%  ;   100+16 =116% )