в) 2 2/5 : (3 2/5 − 1 11/15) =

Преобразуем смешанные числа и вычислим разность в скобках:

\(2\frac{2}{5}=\frac{12}{5}\), \(3\frac{2}{5}=\frac{51}{15}\), \(1\frac{11}{15}=\frac{26}{15}\).

\(3\frac{2}{5}-1\frac{11}{15}=\frac{51}{15}-\frac{26}{15}=\frac{25}{15}=\frac{5}{3}\).

\(\frac{12}{5}:\frac{5}{3}=\frac{12}{5}\cdot\frac{3}{5}=\frac{36}{25}=1\frac{11}{25}\).

Ответ: \(1\frac{11}{25}\)