Ответ:

\(\frac{7}{25}+\frac{1}{5}=\frac{7}{25}+\frac{5}{25}=\frac{12}{25}\).

\(\frac{12}{25}:\frac{3}{50}=\frac{12}{25}\cdot\frac{50}{3}=8\).

Ответ: 8.