2. Вычислите: \(\frac{27}{40}:18+\frac{9}{16}\).

\(\frac{27}{40}:18=\frac{27}{40}\cdot\frac{1}{18}=\frac{3}{80}\).

\(\frac{3}{80}+\frac{9}{16}=\frac{3}{80}+\frac{45}{80}=\frac{48}{80}=\frac{3}{5}\).

Ответ: \(\frac{3}{5}\)