$$\frac{ 13 }{ 20 } \times 117$$
$\frac{1521}{20}=76.05$
$$\frac{13\times 117}{20}$$
$$\frac{1521}{20}$$
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$\frac{3 ^ {2} \cdot 13 ^ {2}}{2 ^ {2} \cdot 5} = 76\frac{1}{20} = 76.05$
