$$160+ \frac { 3 } { 4 }$$
$\frac{643}{4}=160.75$
$$\frac{640}{4}+\frac{3}{4}$$
$$\frac{640+3}{4}$$
$$\frac{643}{4}$$
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$\frac{643}{2 ^ {2}} = 160\frac{3}{4} = 160.75$