To divide by a fraction, multiply by its reciprocal.

Cancel the common factor of .

Factor out of .

Factor out of .

Cancel the common factor.

Rewrite the expression.

Multiply and .

Factor out of .

Factor out of .

Factor out of .

Factor out of .

Multiply by .

Factor out of .

Factor out of .

Factor out of .

Factor out of .

Multiply by .

Cancel the common factor of and .

Factor out of .

Cancel the common factors.

Factor out of .

Cancel the common factor.

Rewrite the expression.

Cancel the common factor of .

Cancel the common factor.

Rewrite the expression.

Cancel the common factor of .

Cancel the common factor.

Rewrite the expression.

Move the negative one from the denominator of .

Multiply by .

Simplify ((25a^3)/(10a^3-20a^2))÷((-a)/(4a-8))