You can put this solution on YOUR website! In the numerator multiply all exponents by "2"; in the denominator
multiply all exponents by "3", to get:
[(-8)^2x^4y^4]/[4^3x^9y^3]
=[64x^4y^4]/[64x^9y^3]
=[x^4y^4]/[x^9y^3]
Now subtract exponents for the same letter in such a way
that you maintain positive exponents.
For example x^4/x^9 = 1/x^5
But y^4/y3 = y
So the final answer is y/x^5
Cheers,
Stan H.