## Elementary Algebra

$\frac{9}{4}$
Recall the rule: $x^{-n}=\frac{1}{x^{n}}$ We first rearrange the expression into a form that doesn't contain any negative exponents, and then we solve the expression. $(\frac{2}{3})^{-2}=\frac{2^{-2}}{3^{-2}}=\frac{3^{2}}{2^ {2}}=\frac{9}{4}$