10. \(\frac{28}{5}:\frac{7}{3}\)

\(\frac{28}{5}:\frac{7}{3}=\frac{28}{5}\cdot\frac{3}{7}=\frac{12}{5}=2\frac{2}{5}\).

Ответ: \(\frac{12}{5}=2\frac{2}{5}\)