Answer
$\frac{y^1{^0}}{2x^5}$
Work Step by Step
You have $\frac{4x^-{^2}y^4}{8x^3y^-{^6}}$. Simplify the expression:
$\frac{x^-{^2}y^4}{2x^3y^-{^6}}$. -cancel out the common factor which is 4-
$\frac{y^1{^0}}{2x^5}$. -subtract exponents with the same base-
The simplified expression is $\frac{y^1{^0}}{2x^5}$