Answer
$\color{blue}{\dfrac{7y-8x^2}{x^2y}}$
Work Step by Step
Make the rational expressions similar by using their LCD of $x^2y$ to obtain:
$\dfrac{7}{x^2}-\dfrac{8}{y}
\\=\dfrac{7\color{magenta}{(y)}}{x^2\color{magenta}{(y)}}-\dfrac{8\color{magenta}{(x^2)}}{y\color{magenta}{(x^2)}}
\\=\dfrac{7y}{x^2y}-\dfrac{8x^2}{x^2y}
\\=\color{blue}{\dfrac{7y-8x^2}{x^2y}}$
