$$1-\frac{1}{\sqrt{16}}$$
$\frac{3}{4}=0.75$
$$1-\frac{1}{4}$$
$$\frac{4}{4}-\frac{1}{4}$$
$$\frac{4-1}{4}$$
$$\frac{3}{4}$$
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$\frac{3}{2 ^ {2}} = 0.75$
