13) 7 3/7 : 3 3/5

\(7\frac{3}{7}=\frac{52}{7}\), \(3\frac{3}{5}=\frac{18}{5}\).

\(\frac{52}{7}:\frac{18}{5}=\frac{52}{7}\cdot\frac{5}{18}=\frac{130}{63}=2\frac{4}{63}\).

Ответ: \(2\frac{4}{63}\).