\[( - 4,3 - 1,2)\ :\left( - 1\frac{7}{15} \right) =\]
\[= - 5,5\ :\left( - \frac{22}{15} \right) = \frac{55}{10} \cdot \frac{15}{22} =\]
\[= \frac{5 \cdot 3}{2 \cdot 2} = \frac{15}{4} = 3,75\]