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Subtract 81/56 from 20/12

1st number: 1 8/12, 2nd number: 1 25/56

20/12 - 81/56 is 37/168.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 56 is 168
  2. For the 1st fraction, since 12 × 14 = 168,
    20/12 = 20 × 14/12 × 14 = 280/168
  3. Likewise, for the 2nd fraction, since 56 × 3 = 168,
    81/56 = 81 × 3/56 × 3 = 243/168
  4. Subtract the two fractions:
    280/168 - 243/168 = 280 - 243/168 = 37/168

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