41. \(\frac{0{,}8}{1+\frac{1}{7}}\)

\(0{,}8=\frac{4}{5}\), а \(1+\frac{1}{7}=\frac{8}{7}\).

\(\frac{4}{5}:\frac{8}{7}=\frac{4}{5}\cdot\frac{7}{8}=\frac{7}{10}=0{,}7\).

Ответ: 0,7.