Simplify : $\bigg(x^{\Large\frac{-2}{3}}y ^{\Large\frac{4}{5}}\bigg)^{\large\frac{15}{4}}$

Question

$\begin{array}{1 1} \Large\frac{y^3}{x^{5/2}} \\ \large\frac{x^{5/2}}{y} \\ \large\frac{x}{y} \\ \large\frac{y}{x} \end{array} $