$$[(\frac{2}{3})^{3}+\frac{4}{9}]\div(\frac{3}{5})^{-3}$$
$\frac{4}{25}=0.16$
$$\frac{\frac{8}{27}+\frac{4}{9}}{\left(\frac{3}{5}\right)^{-3}}$$
$$\frac{\frac{20}{27}}{\left(\frac{3}{5}\right)^{-3}}$$
$$\frac{\frac{20}{27}}{\frac{125}{27}}$$
$$\frac{20}{27}\times \frac{27}{125}$$
$$\frac{4}{25}$$
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$\frac{2 ^ {2}}{5 ^ {2}} = 0.16$
