$$2 + ( \frac { - 11 } { 9 } )$$
$\frac{7}{9}\approx 0.777777778$
$$2-\frac{11}{9}$$
$$\frac{18}{9}-\frac{11}{9}$$
$$\frac{18-11}{9}$$
$$\frac{7}{9}$$
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$\frac{7}{3 ^ {2}} = 0.7777777777777778$
