$$\frac{1}{2}\times2\frac{1}{4}$$
$\frac{9}{8}=1.125$
$$\frac{1}{2}\times \frac{8+1}{4}$$
$$\frac{1}{2}\times \frac{9}{4}$$
$$\frac{1\times 9}{2\times 4}$$
$$\frac{9}{8}$$
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$\frac{3 ^ {2}}{2 ^ {3}} = 1\frac{1}{8} = 1.125$
