Answer: -416/1575
Step-by-step explanation:
[tex]\frac{4}{5}=\frac{20}{25} \implies \frac{4}{5}+\frac{6}{25}=\frac{26}{25}\\[/tex]
[tex]\frac{8}{9}=\frac{56}{63}\\\\-\frac{8}{7}=-\frac{72}{63}\\\\\implies \frac{8}{9}-\frac{8}{7}=-\frac{16}{63}[/tex]
[tex]\frac{26}{25} \times -\frac{16}{63}=-\frac{416}{1575}[/tex]
