[tex]\displaystyle\text{p.i - pret initial} \\ \text{p.f - pret final } \\ \text{p - procent } \\ \\ \boxed{ p.i+ \frac{p }{100}\cdot p.i = pf} \\ } \\ \boxed{ p.i- \frac{p}{100}\cdot p.i = pf} \\ ---------- \\\\ 120- \frac{4\not0}{1\not0\not0}\cdot 12\not0 = pf \\ \\ \\ 120-48 = 72 \\ \\\\ \text{Pretul final este de 72 de lei.}[/tex]
