Find each quotient. Write in simplest form. keep answer as fraction - not decimal

[tex] \frac{mn^{2}}{4} /\frac{m^{2}n}{8} [/tex]
in division of fraction we take reciprocal of second fraction and multiply it with first
[tex] \frac{mn^{2}}{4} * \frac{8}{m^{2}n} [/tex]
cancelling like terms we get
[tex] \frac{2n}{m} [/tex]