Move to the denominator using the negative exponent rule .

Use the power rule to combine exponents.

Combine the numerators over the common denominator.

Add and .

Rewrite as .

Apply the power rule and multiply exponents, .

Cancel the common factor of .

Cancel the common factor.

Rewrite the expression.

Evaluate the exponent.

The result can be shown in multiple forms.

Exact Form:

Decimal Form:

Evaluate (27^(-2/3))/(27^(-1/3))