Răspuns :
100%+10%=110%
600 lei × 110%=600×110/100=660 lei
100%+20%=120%
660 lei × 120%=660×120/100=792 lei
600 lei × 110%=600×110/100=660 lei
100%+20%=120%
660 lei × 120%=660×120/100=792 lei