A3. What is the value of $\left(\frac{4}{5}\right)^{3}$ as a decimal?
$\begin{array}{ll}\text { Solution } & \mathbf{0 . 5 1 2}\end{array}$
$$
\left(\frac{4}{5}\right)^{3}=\frac{4^{3}}{5^{3}}=\frac{64}{125}=\frac{64 \times 8}{125 \times 8}=\frac{512}{1000}=0.512 \text {. }
$$