$$1:(-8)-(-9)-(-8)$$
$\frac{135}{8}=16.875$
$$-\frac{1}{8}-\left(-9\right)-\left(-8\right)$$
$$-\frac{1}{8}+9-\left(-8\right)$$
$$-\frac{1}{8}+\frac{72}{8}-\left(-8\right)$$
$$\frac{-1+72}{8}-\left(-8\right)$$
$$\frac{71}{8}-\left(-8\right)$$
$$\frac{71}{8}+8$$
$$\frac{71}{8}+\frac{64}{8}$$
$$\frac{71+64}{8}$$
$$\frac{135}{8}$$
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$\frac{3 ^ {3} \cdot 5}{2 ^ {3}} = 16\frac{7}{8} = 16.875$
