\[\left( - \frac{5}{12} + \frac{11}{16} \right)\ :\left( - \frac{13}{72} \right) =\]
\[= \left( - \frac{20}{48} + \frac{33}{48} \right)\ :\left( - \frac{13}{72} \right) =\]
\[= \frac{13}{48} \cdot \left( - \frac{72}{13} \right) =\]
\[= - \frac{13 \cdot 72}{48 \cdot 13} = - \frac{3}{2} = - 1,5\]