Decimals and Fractions Practice Test 4

Part of book read in one day $=\frac{3}{8}$ part
Unread part $=1-\frac{3}{8}=\frac{5}{8}$ part
Now $\frac{4}{5}$ of $\frac{5}{8}$ is read on another day
$\frac{4}{5}\times \frac{5}{8}=\frac{20}{40}=\frac{1}{2}$ part
Pages left unread $=\frac{5}{8}-\frac{1}{2}=\frac{5-4}{8}=\frac{1}{8}$ Part
Let the total pages of the book = x
Pages unread $=\frac{1}{8}\mathrm{of}\mathit{x}$ $=30=\frac{1}{8}\times \mathit{x}=30$
Total pages of the book = x = 240 pages