49. \(7\frac{1}{2}:4\frac{1}{2}\cdot\frac{3}{5}\)

\(\frac{15}{2}:\frac{9}{2}\cdot\frac{3}{5}=\frac{15}{2}\cdot\frac{2}{9}\cdot\frac{3}{5}=1\).

Ответ: 1