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Subtract 12/10 from 9/28

1st number: 9/28, 2nd number: 1 2/10

9/28 - 12/10 is -123/140.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 10 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 28 × 5 = 140,
    9/28 = 9 × 5/28 × 5 = 45/140
  3. Likewise, for the 2nd fraction, since 10 × 14 = 140,
    12/10 = 12 × 14/10 × 14 = 168/140
  4. Subtract the two like fractions:
    45/140 - 168/140 = 45 - 168/140 = -123/140

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