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Subtract 9/7 from 27/28

1st number: 27/28, 2nd number: 1 2/7

27/28 - 9/7 is -9/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 7 is 28
  2. For the 1st fraction, since 28 × 1 = 28,
    27/28 = 27 × 1/28 × 1 = 27/28
  3. Likewise, for the 2nd fraction, since 7 × 4 = 28,
    9/7 = 9 × 4/7 × 4 = 36/28
  4. Subtract the two fractions:
    27/28 - 36/28 = 27 - 36/28 = -9/28

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