Сократите дробь: (y^2-16)/(4y^2-y^3).

\[\frac{y^{2} - 16}{y^{2} - y^{3}} = \frac{(y - 4)(y + 4)}{y^{2}(4 - y)} =\]

\[= - \frac{y + 4}{y^{2}}\]