$$3\frac{5}{12}-1\frac{2}{3}$$
$\frac{7}{4}=1.75$
$$\frac{36+5}{12}-\frac{1\times 3+2}{3}$$
$$\frac{41}{12}-\frac{1\times 3+2}{3}$$
$$\frac{41}{12}-\frac{3+2}{3}$$
$$\frac{41}{12}-\frac{5}{3}$$
$$\frac{41}{12}-\frac{20}{12}$$
$$\frac{41-20}{12}$$
$$\frac{21}{12}$$
$$\frac{7}{4}$$
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$\frac{7}{2 ^ {2}} = 1\frac{3}{4} = 1.75$
