b45=89

Multiply both sides of the equation by 45.

45⋅b45=45⋅89

Cancel the common factor of 45.

Cancel the common factor.

45⋅b45=45⋅89

Rewrite the expression.

b=45⋅89

b=45⋅89

Simplify 45⋅89.

Cancel the common factor of 9.

Factor 9 out of 45.

b=9(5)⋅89

Cancel the common factor.

b=9⋅5⋅89

Rewrite the expression.

b=5⋅8

b=5⋅8

Multiply 5 by 8.

b=40

b=40

b=40

Solve for b b/45=8/9