$$\frac{7}{9}+\frac{1}{2}$$
$\frac{23}{18}\approx 1.277777778$
$$\frac{14}{18}+\frac{9}{18}$$
$$\frac{14+9}{18}$$
$$\frac{23}{18}$$
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$\frac{23}{2 \cdot 3 ^ {2}} = 1\frac{5}{18} = 1.2777777777777777$