## Precalculus (6th Edition) Blitzer

$\frac{1}{27}$
Expand the exponents in the numerator and denominator, and simplify: $$\frac{3^3}{3^6}=\frac{3\cdot 3\cdot 3}{3\cdot 3\cdot 3\cdot3\cdot 3\cdot 3}=\frac{1}{3\cdot 3\cdot 3}=\frac{1}{27}$$