To write as a fraction with a common denominator, multiply by .

Combine and .

Combine the numerators over the common denominator.

Simplify the numerator.

Multiply by .

Subtract from .

Multiply the numerator by the reciprocal of the denominator.

Multiply by .

The result can be shown in multiple forms.

Exact Form:

Decimal Form:

Evaluate -1/(8-1/8)