# How do you simplify (25m^4n)/(-15mn^6)?

$\frac{25 {m}^{4} n}{- 15 m {n}^{6}}$
$= \left(- \frac{25}{15}\right) \cdot \left({m}^{4} / m\right) \cdot \left(\frac{n}{n} ^ 6\right)$
$= \left(- \frac{5}{3}\right) \cdot \left({m}^{3}\right) \cdot \left(\frac{1}{n} ^ 5\right)$
$= - \frac{5 {m}^{3}}{3 {n}^{5}}$