Answer:
x
Explanation:
When writing out an canceling variable/exponents within a fraction, you always subtract the top and bottom. So...
![(x^(4)y^(3))/(x^(3)y^(4))](https://img.qammunity.org/2022/formulas/mathematics/high-school/d6p6eeihigko4sye2ztble4e0zi1wm6c7e.png)
When you subtract, you always put the leftover variable in the spot that had the highest valued exponent.
So the equation simplifies to
![(x)/(y)](https://img.qammunity.org/2022/formulas/mathematics/high-school/rfw7xlxu0q6wq2f809g22wz475tg5tzufj.png)
x, is on top so it is the numerator.