Ответ:

\(4\frac{1}{5}=\frac{21}{5}\).

\(1-\frac{3}{7}\cdot\frac{21}{5}=1-\frac{9}{5}=\frac{5}{5}-\frac{9}{5}=-\frac{4}{5}\).

Ответ: \(-\frac{4}{5}\).