BBB 2021 - Grade 5 - Preliminary Round Question 5

Find the value of $\left(\frac{15}{16}+\frac{15}{32}+\frac{15}{64}+\frac{15}{80}\right)\div\left(\frac9{32}+\frac9{64}+\frac9{128}+\frac9{160}\right)$.