$-\frac{ 5 }{ 6 }\div\frac{ 2 }{ 3 }$
To divide by a fraction, multiply by the reciprocal of that fraction$-\frac{ 5 }{ 6 } \times \frac{ 3 }{ 2 }$
Cancel out the greatest common factor $3$$-\frac{ 5 }{ 2 } \times \frac{ 1 }{ 2 }$
Multiply the fractions$\begin{align*}&-\frac{ 5 }{ 4 } \\&\begin{array} { l }-1 \frac{ 1 }{ 4 },& -1.25\end{array}\end{align*}$