$${ \left( \frac{ 13 }{ 15 } \right) }^{ 2 }$$
$\frac{169}{225}\approx 0.751111111$
$$\frac{169}{225}$$
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$\frac{13 ^ {2}}{3 ^ {2} \cdot 5 ^ {2}} = 0.7511111111111111$
