Сократите дробь: (m^3-5m^2n)/(5n^3-mn^2).

\[\frac{m^{3} - 5m^{2}n}{5n^{3} - mn^{2}} = \frac{m^{2}(m - 5n)}{n^{2}(5n - m)} =\]

\[= - \frac{m^{2}}{n^{2}}\]