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Subtract 1/7 from 1/8

1/8 - 1/7 is -1/56.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 7 is 56

    Next, find the equivalent fraction of both fractional numbers with denominator 56
  2. For the 1st fraction, since 8 × 7 = 56,
    1/8 = 1 × 7/8 × 7 = 7/56
  3. Likewise, for the 2nd fraction, since 7 × 8 = 56,
    1/7 = 1 × 8/7 × 8 = 8/56
  4. Subtract the two like fractions:
    7/56 - 8/56 = 7 - 8/56 = -1/56

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