Question

Dupa doua reduceri consecutive de 15% si apoi de 20% un produs costa 408 lei. Care a fost pretul initial ?
Repedee

Answer 1

x= preț inițial

x-15%x=y

y-20%y=408
80%y=408
80/100y=408
y=408:80/100
y=408•100/80
y=510

x-15%x=510
85%x=510
85/100x=510
x=510:85/100
x=510•100/85
x=600 lei