$$8+ \frac{ 5 }{ 160 } \times -3$$
$\frac{253}{32}=7.90625$
$$8+\frac{1}{32}\left(-3\right)$$
$$8+\frac{-3}{32}$$
$$8-\frac{3}{32}$$
$$\frac{256}{32}-\frac{3}{32}$$
$$\frac{256-3}{32}$$
$$\frac{253}{32}$$
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$\frac{11 \cdot 23}{2 ^ {5}} = 7\frac{29}{32} = 7.90625$