e) \(\frac{p}{q-p} - \frac{p}{q} = \frac{p \cdot q - p \cdot (q-p)}{(q-p)q} = \frac{pq - (pq-p^2)}{(q-p)q} = \frac{pq - pq + p^2}{(q-p)q} = \frac{p^2}{(q-p)q}\)
Ответ: \(\frac{p^2}{(q-p)q}\)