Power of a Quotient Property

Example 1:

$\frac{{20}^3}{4^3}=\frac{5\cdot \cancel{4}\cdot 5\cdot \cancel{4}\cdot 5\cdot \cancel{4}}{\cancel{4}\cdot \cancel{4}\cdot \cancel{4}}=5^3$

Example 2:

Simplify ${\left(\frac{a}{6}\right)}^2$ .

${\left(\frac{a}{6}\right)}^2=\frac{a^2}{6^2}=\frac{a^6}{36}$