17. \(\frac{15}{28}\cdot\frac{14}{25}=\)

Сократим: \(\frac{15}{25}=\frac{3}{5}\), \(\frac{14}{28}=\frac{1}{2}\).

\(\frac{15}{28}\cdot\frac{14}{25}=\frac{3}{5}\cdot\frac{1}{2}=\frac{3}{10}\).

Ответ: \(\frac{3}{10}\)