2) 1 3/5 : 1/3

\(1\frac{3}{5}=\frac{8}{5}\).

\(\frac{8}{5}:\frac{1}{3}=\frac{8}{5}\cdot3=\frac{24}{5}=4\frac{4}{5}\).

Ответ: 4 4/5.