10) 12 3/7 : 4 5/6

\(12\frac{3}{7}=\frac{87}{7}\), \(4\frac{5}{6}=\frac{29}{6}\).

\(\frac{87}{7}:\frac{29}{6}=\frac{87}{7}\cdot\frac{6}{29}=\frac{18}{7}=2\frac{4}{7}\).

Ответ: 2 4/7.