700lei...100%
x lei....15%
x=15*700:100=105 lei
Dupa prima scumpire , obieectul costa 700+105=805
805lei.....100%
xlei...........10%
x =805*10:100=80,5
Dupa a doua scumpire obiectul costa 805+ 80,5=885,5
885,5lei......100%
700 lei..........x%
x=700*100:885,5= 79,05%
100%-79,5%=20,5 %