Răspuns :
[tex]\it a)\ \ 15\%\ din\ 2000=\dfrac{15}{100}\cdot2000=15\cdot20=300\ \ell ei\ (reducerea)\\ \\ b)\ 2000-300=1700\ \ell ei\ (pre\c{\it t}ul\ la\ promo\c{\it t}ie)\\ \\ c)\ 1970+\dfrac{15}{100}\cdot1700=1700+15\cdot17=1700+255=1955\ \ell ei[/tex]