To divide by a fraction, multiply by its reciprocal.

Factor out of .

Factor out of .

Cancel the common factor.

Rewrite the expression.

Factor out of .

Factor out of .

Cancel the common factor.

Rewrite the expression.

Multiply and .

Multiply by .

Factor out of .

Cancel the common factors.

Factor out of .

Cancel the common factor.

Rewrite the expression.

Move to the left of .

Simplify ((18a^9)/(2y^10))÷((81a^7)/(6y^7))