Răspuns :
dobanda este 7 putem afla dobanda si apoi o adaugam la suma initiala sau aplicam 107 =100+7 la suma respectiva
100----------3500
107-------------x x=107x3500/100=3745 suma totala verific 3745-3500=245
100--------3500
y------------245 y=245x100/3500=7 deci este bine
100----------3500
107-------------x x=107x3500/100=3745 suma totala verific 3745-3500=245
100--------3500
y------------245 y=245x100/3500=7 deci este bine