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Subtract 8/7 from 1/3

1st number: 1/3, 2nd number: 1 1/7

1/3 - 8/7 is -17/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 3 and 7 is 21

    Next, find the equivalent fraction of both fractional numbers with denominator 21
  2. For the 1st fraction, since 3 × 7 = 21,
    1/3 = 1 × 7/3 × 7 = 7/21
  3. Likewise, for the 2nd fraction, since 7 × 3 = 21,
    8/7 = 8 × 3/7 × 3 = 24/21
  4. Subtract the two like fractions:
    7/21 - 24/21 = 7 - 24/21 = -17/21

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