Răspuns :
[tex]\it p\% \ din\ 12500=750 \Rightarrow \dfrac{p}{100}\cdot12500=750\Rightarrow p\cdot125=750|_{:125} \Rightarrow \\\;\\ \\\;\\ \Rightarrow p=6[/tex]
Rata dobânzii este 6%.
12500......100% ; 750 .......x; x=750×100:12500 ; x=75000:12500.x=6% rata dobânzii.Verificare: 12500×6/100=750 lei dobanda