\[\left( 5\frac{1}{6} - 4\frac{8}{15} \right) \cdot \left( - \frac{15}{19} \right) =\]
\[= \left( 5\frac{5}{30} - 4\frac{16}{30} \right) \cdot \left( - \frac{15}{19} \right) =\]
\[= \left( 4\frac{35}{30} - 4\frac{16}{30} \right) \cdot \left( - \frac{15}{19} \right) =\]
\[= \frac{19}{30} \cdot \left( - \frac{15}{19} \right) = - \frac{1}{2} = - 0,5\]