Simplify the following expression. Assume that all variables represent positive real numbers. Give your answer in terms of positive exponents.

$\frac{m^{\frac{1}{4}}{n}^{\frac{-3}{4}}}{(m^{2}n{)}^{\frac{1}{2}}}$

$\frac{m^{\frac{1}{4}}{n}^{\frac{-3}{4}}}{(m^{2}n{)}^{\frac{1}{2}}}=$

$($Give your answer in terms of positive exponents.$)$