$$(7/8 \times 2)-10/8+1/8$$
$\frac{5}{8}=0.625$
$$\frac{7\times 2}{8}-\frac{10}{8}+\frac{1}{8}$$
$$\frac{14}{8}-\frac{10}{8}+\frac{1}{8}$$
$$\frac{7}{4}-\frac{10}{8}+\frac{1}{8}$$
$$\frac{7}{4}-\frac{5}{4}+\frac{1}{8}$$
$$\frac{7-5}{4}+\frac{1}{8}$$
$$\frac{2}{4}+\frac{1}{8}$$
$$\frac{1}{2}+\frac{1}{8}$$
$$\frac{4}{8}+\frac{1}{8}$$
$$\frac{4+1}{8}$$
$$\frac{5}{8}$$
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$\frac{5}{2 ^ {3}} = 0.625$
