8) \(5\cdot\frac{4}{25}:\frac{7}{18}\cdot\frac{28}{36}=\)

\[5\cdot\frac{4}{25}:\frac{7}{18}\cdot\frac{28}{36}=5\cdot\frac{4}{25}\cdot\frac{18}{7}\cdot\frac{28}{36}=\frac{8}{5}\]

Ответ: \(\frac{8}{5}\)