Evaluate the expression and reduce the result to lowest term.
(1/7) — (1/8)
= ((1 * 8) / (7 * 8)) — ((1 * 7) / (7 * 8))
= (8 / 56) — (7 / 56)
= 1/56 Lowest terms since there are no common factors
1 /56=1 /(2*2*2*7)
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