[tex] ( \frac{15}{8} \times ( - \frac{9}{5} ) + \frac{9}{16} ) \times ( - \frac{8}{9} ) = ( - \frac{3}{8} \times 9 + \frac{9}{16} ) \times ( - \frac{8}{9} ) = ( - \frac{27}{8} + \frac{9}{16} ) \times ( - \frac{8}{9} ) = - \frac{45}{16} \times - \frac{8}{9} = \frac{45}{16} \times \frac{8}{9} = \frac{5}{2} = 2.5[/tex]