Question

un magazin face o reducere de 10la suta la produsele  electrocasnice ,astfel ca  un frigider costa acum 1080 de lei .Reducerea a fost de :

Answer 1

x-pretul initial

10% din x=10/100 *x=  1/10 *x=x/10  -reducerea

x-x/10=(10x-x)/10=9x/10

9x/10=1080

x=10*1080/9

x=10*120

x=1200 -pretul intial

x/10=1200/10=120 lei a fost reducerea

Answer 2

Cost-Cost *10%=Cost-Cost *1/10=Cost*9/10=1080
=> Cost=1080*10/9
Cost=1200 lei