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Subtract 20/7 from 15/56

1st number: 15/56, 2nd number: 2 6/7

15/56 - 20/7 is -145/56.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 56 and 7 is 56
  2. For the 1st fraction, since 56 × 1 = 56,
    15/56 = 15 × 1/56 × 1 = 15/56
  3. Likewise, for the 2nd fraction, since 7 × 8 = 56,
    20/7 = 20 × 8/7 × 8 = 160/56
  4. Subtract the two fractions:
    15/56 - 160/56 = 15 - 160/56 = -145/56

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