Answer
$\frac{33}{56}$
Work Step by Step
LCD is 56.
$\frac{5}{7}-\frac{1}{8}=\frac{5\times8}{7\times8}-\frac{1\times7}{8\times7}=\frac{40}{56}-\frac{7}{56}=\frac{40-7}{56}=\frac{33}{56}$
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