$$\frac{ { 2 }^{ 2 } }{ { 9 }^{ 2 } }$$
$\frac{4}{81}\approx 0.049382716$
$$\frac{4}{9^{2}}$$
$$\frac{4}{81}$$
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$\frac{2 ^ {2}}{3 ^ {4}} = 0.04938271604938271$
