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 and .

Factor out of .

Cancel the common factors.

Factor out of .

Cancel the common factor.

Rewrite the expression.

Combine the numerators over the common denominator.

Subtract from .

Divide by .

Multiply by .

Multiply by .

Combine.

Write as a fraction with denominator .

Multiply by .

Multiply and .

Reorder the factors of .

Multiply by .

Combine fractions with similar denominators.

Multiply.

Multiply by .

Multiply by .

Subtract from .

Subtract from .

Move the negative in front of the fraction.

The result can be shown in multiple forms.

Exact Form:

Decimal Form:

Evaluate (3/4-2/16)-(8/7-3/21)