$$(\frac{4}{9}-1)^{-1}\frac{-1}{2}}$$
$\frac{9}{10}=0.9$
$$\left(-\frac{5}{9}\right)^{-1}\times \frac{-1}{2}$$
$$-\frac{9}{5}\times \frac{-1}{2}$$
$$-\frac{9}{5}\left(-\frac{1}{2}\right)$$
$$\frac{9}{10}$$
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$\frac{3 ^ {2}}{2 \cdot 5} = 0.9$
