Answer:
1. [tex](-\frac{3}{4}) (\frac{7}{8} )[/tex] = [tex]-\frac{3 * 7}{4 * 8}[/tex]
= [tex]-\frac{21}{32}[/tex]
2. [tex](\frac{2}{3}) (-4)(9)[/tex] = [tex]\frac{2* -4 * 9}{3}[/tex]
= [tex]-\frac{72}{3}[/tex]
= -24
3. [tex](\frac{5}{16}) (-2)(-4)(-\frac{4}{5} )[/tex] = [tex]\frac{5}{16} * 8 * -\frac{4}{5}[/tex]
= [tex]\frac{5}{2} * -\frac{4}{5}[/tex]
= -2
4. [tex]2\frac{3}{5} = \frac{13}{5}[/tex]
= [tex]\frac{13}{5}[/tex]* [tex]\frac{7}{9}[/tex]
= [tex]\frac{91}{45}[/tex]
