$$\left. \begin{array} { l } { - \frac { 6 } { 2 } \times ( 2 \frac { 2 } { 3 } + 2 \frac { 1 } { 2 } ) } \end{array} \right.$$
$-\frac{31}{2} = -15\frac{1}{2} = -15.5$
