15\(\frac{1}{7}\) + 5\(\frac{2}{5}\) = □

Общий знаменатель дробей — 35: \(\frac{1}{7}=\frac{5}{35}\), \(\frac{2}{5}=\frac{14}{35}\).

\(15\frac{5}{35}+5\frac{14}{35}=20\frac{19}{35}\).

Ответ: \(20\frac{19}{35}\).