$$\frac{ 1 }{ 4 } + \frac{ 2 }{ 2 } + \frac{ 1 }{ 1 }$$
$\frac{9}{4}=2.25$
$$\frac{1}{4}+1+\frac{1}{1}$$
$$\frac{1}{4}+1+1$$
$$\frac{1}{4}+\frac{4}{4}+1$$
$$\frac{1+4}{4}+1$$
$$\frac{5}{4}+1$$
$$\frac{5}{4}+\frac{4}{4}$$
$$\frac{5+4}{4}$$
$$\frac{9}{4}$$
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$\frac{3 ^ {2}}{2 ^ {2}} = 2\frac{1}{4} = 2.25$
