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Subtract 15/7 from 3/8

1st number: 3/8, 2nd number: 2 1/7

3/8 - 15/7 is -99/56.

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,
    3/8 = 3 × 7/8 × 7 = 21/56
  3. Likewise, for the 2nd fraction, since 7 × 8 = 56,
    15/7 = 15 × 8/7 × 8 = 120/56
  4. Subtract the two like fractions:
    21/56 - 120/56 = 21 - 120/56 = -99/56

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