Răspuns:
Explicație pas cu pas:
P = pretul initial
b)
P*70/100 = 147
P = 147*100/70 = 210 lei
c)
P*110/100*110/100 = 363
P = 363*100*100/(110*110) = 300 lei
d)
P*90/100*90/100 = 162
P = 162*100*100/(90*90) = 200 lei
e)
P*80/100*110/100 = 145,2
P = 145,2*100*100/(80*110) = 165 lei
f)
P*110/100*75/100 = 70,2
P = 70,2*100*100/(110*75) = 85,(09) lei