Răspuns :
50 ron.............100%
x.......................100+15=115%
x=115*50:100= 57, 5 ron
x.......................100+15=115%
x=115*50:100= 57, 5 ron
[tex]15\% \ din \ 50= \frac{15}{100}*50= \frac{15}{2} *1 = 7,5 ron -scumpirea \\\\\\ 50+7,5 \to \boxed{57,5 \ ron - noul \ pret}[/tex]