\[\frac{3^{- 5}}{3^{- 8} \cdot 9^{2}} = \frac{3^{8}}{3^{5} \cdot \left( 3^{2} \right)^{2}} =\]
\[= \frac{3^{8}}{3^{5} \cdot 3^{4}} = \frac{3^{8}}{3^{9}} = \frac{1}{3}.\]