е) \(15\cdot\frac{7}{25}\)

Сократим дробь \(\frac{15}{25}\) на 5:

\(15\cdot\frac{7}{25}=\frac{15\cdot7}{25}=\frac{3\cdot7}{5}=\frac{21}{5}=4\frac{1}{5}\).

Ответ: \(4\frac{1}{5}\).