8. Вычислите: \(\left(\frac{7}{8} - \frac{5}{24}\right) \cdot \frac{3}{14}\).

\(\frac{7}{8} = \frac{21}{24}\), поэтому

\(\frac{7}{8} - \frac{5}{24} = \frac{21}{24} - \frac{5}{24} = \frac{16}{24} = \frac{2}{3}\).

\(\frac{2}{3} \cdot \frac{3}{14} = \frac{1}{7}\).

Ответ: \(\frac{1}{7}\).