Вычислите: 3/4 · 6/5; 9/5 · 2/3; 2/5 · 9/8; 15/2 · 7/5; 15/4 · 6/5.

1. \(\frac{3}{4}\cdot\frac{6}{5}=\frac{18}{20}=\frac{9}{10}\).
2. \(\frac{9}{5}\cdot\frac{2}{3}=\frac{18}{15}=\frac{6}{5}\).
3. \(\frac{2}{5}\cdot\frac{9}{8}=\frac{18}{40}=\frac{9}{20}\).
4. \(\frac{15}{2}\cdot\frac{7}{5}=\frac{105}{10}=\frac{21}{2}\).
5. \(\frac{15}{4}\cdot\frac{6}{5}=\frac{90}{20}=\frac{9}{2}\).

Ответ: \(\frac{9}{10};\ \frac{6}{5};\ \frac{9}{20};\ \frac{21}{2};\ \frac{9}{2}\).