Rewrite the equation as .

Multiply both sides of the equation by .

Simplify .

Cancel the common factor of .

Cancel the common factor.

Rewrite the expression.

Cancel the common factor of .

Cancel the common factor.

Rewrite the expression.

Multiply by .

Simplify .

To divide by a fraction, multiply by its reciprocal.

Cancel the common factor of .

Cancel the common factor.

Rewrite the expression.

Cancel the common factor of .

Cancel the common factor.

Rewrite the expression.

Multiply by .

Multiply both sides of the equation by .

Combine and .

Solve for a (3/8)÷(13/12)=3/8*a/b