2. Вычислите \(2\frac{7}{15}-1\frac{2}{3}\).

\(2\frac{7}{15}=\frac{37}{15}\), \(1\frac{2}{3}=\frac{25}{15}\).

\(\frac{37}{15}-\frac{25}{15}=\frac{12}{15}=\frac{4}{5}\).

Ответ: \(\frac{4}{5}\).