Answer
$20x^7y^4$
Work Step by Step
Divide the monomials by cancelling out common factors of the numbers and subtracting the exponents of variables.
$\frac{40x^9y^5}{2x^2y}=\frac{40}{2}x^{(9-2)}y^{(5-1)}=20x^7y^4$
Check the answer.
$2x^2y(20x^7y^4)=40x^{(2+7)}y^{(1+4)}=40x^9y^5$
