42. 1,4/(1 + 1/5)

\(1+\frac{1}{5}=\frac{6}{5}\).

\(1,4:\frac{6}{5}=\frac{7}{5}\cdot\frac{5}{6}=\frac{7}{6}=1\frac{1}{6}\).

Ответ: \(\frac{7}{6}\).