Answer
$-\frac{1}{27}$
Work Step by Step
We are given the expression $(-3)^{-3}$. In general, $a^{-n}=\frac{1}{a^{n}}$, where a is a nonzero real number and n is a positive integer.
Therefore, $(-3)^{-3}=\frac{1}{(-3)^{3}}=\frac{1}{(-3)\times(-3)\times(-3)}=-\frac{1}{27}$
