$$\frac{9}{11}-\frac{4}{33}+\frac{1}{22}$$
$\frac{49}{66}\approx 0.742424242$
$$\frac{27}{33}-\frac{4}{33}+\frac{1}{22}$$
$$\frac{27-4}{33}+\frac{1}{22}$$
$$\frac{23}{33}+\frac{1}{22}$$
$$\frac{46}{66}+\frac{3}{66}$$
$$\frac{46+3}{66}$$
$$\frac{49}{66}$$
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$\frac{7 ^ {2}}{2 \cdot 3 \cdot 11} = 0.7424242424242424$
