$\frac{4}{15}$ - x = $\frac{-16}{25}$.$\frac{5}{64}$
$\frac{4}{15}$ - x = $\frac{-80}{1600}$
$\frac{4}{15}$ - x = $\frac{-1}{20}$
x = $\frac{4}{15}$ - $\frac{-1}{20}$
x = $\frac{16}{60}$ - $\frac{-3}{60}$
x = $\frac{16 - (-3)}{60}$
x = $\frac{19}{60}$