How do i solve this math problem

Here it is: (xy/x^2)^2

i cant remember if the answer is x^2 y^2/ x^4 or xy^2/ x^4

x^2*y^2/x^4

(xy/x^2)^2 = x^2y^2 / x^4 = y^2 / x^2 = (x/y)^2

y^2/x^2