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Subtract 21/7 from 5/12

1st number: 5/12, 2nd number: 3 0/7

5/12 - 21/7 is -31/12.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 7 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 12 × 7 = 84,
    5/12 = 5 × 7/12 × 7 = 35/84
  3. Likewise, for the 2nd fraction, since 7 × 12 = 84,
    21/7 = 21 × 12/7 × 12 = 252/84
  4. Subtract the two like fractions:
    35/84 - 252/84 = 35 - 252/84 = -217/84
  5. After reducing the fraction, the answer is -31/12

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