## Algebra: A Combined Approach (4th Edition)

$\frac {1}{9}$
Keep in mind that the index is the denominator of the exponent. To write an expression without a negative exponent, take the reciprocal of the base with the same exponent's absolute value. $27^{-2/3}$ $\frac {1}{27^{2/3}}$ Reciprocal. $\frac {1}{(\sqrt[3]{27})^{2}}$ $\frac {1}{(3)^{2}}$ $\frac {1}{9}$