[tex]\text{Conform mesajului prin care ai corectat enuntul, avem: } \\ \displaystyle \\
\frac{-11}{28}: \frac{33}{56}= ~~~~~(\text{Inmultim prima fractie cu a doua rasturnata })\\ \\
\frac{-11}{28} \times \frac{56}{33}= -\frac{11 \times 56 }{28 \times 33}=-\frac{1 \times 2 }{1 \times 3}= \boxed{-\frac{ 2 }{3}}[/tex]
