16) 18 2/5 : 6 4/7

\(18\frac{2}{5}:6\frac{4}{7}=\frac{92}{5}:\frac{46}{7}=\frac{92}{5}\cdot\frac{7}{46}=\frac{14}{5}=2\frac{4}{5}\).

Ответ: 2 4/5