Ответ:

\(\frac{14}{25}:\frac{7}{45}=\frac{14}{25}\cdot\frac{45}{7}=\frac{18}{5}\).

\(\frac{18}{5}-3=\frac{18}{5}-\frac{15}{5}=\frac{3}{5}\).

Ответ: \(\frac{3}{5}\)