15. \(\frac{16}{27}\cdot\frac{9}{24}=\)

Сократим: \(\frac{16}{24}=\frac{2}{3}\), \(\frac{9}{27}=\frac{1}{3}\).

\(\frac{16}{27}\cdot\frac{9}{24}=\frac{2}{3}\cdot\frac{1}{3}=\frac{2}{9}\).

Ответ: \(\frac{2}{9}\)