Răspuns :
150:3=50
150+50=200 lei
50:200=0,25=25% procentul de reducere
150+50=200 lei
50:200=0,25=25% procentul de reducere
150/3=50 lei marire
150+50=200 pretul marit
150*100/200=15000/200=75%
verificare:
200*75/100=15000/100=150 pret initial
150+50=200 pretul marit
150*100/200=15000/200=75%
verificare:
200*75/100=15000/100=150 pret initial