$$22 ^ { \circ } \frac { 1 } { 2 }$$
$\frac{45}{2}=22.5$
$$\frac{44+1}{2}$$
$$\frac{45}{2}$$
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$\frac{3 ^ {2} \cdot 5}{2} = 22\frac{1}{2} = 22.5$
