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Subtract 21/7 from 7/12

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

7/12 - 21/7 is -29/12.

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,
    7/12 = 7 × 7/12 × 7 = 49/84
  3. Likewise, for the 2nd fraction, since 7 × 12 = 84,
    21/7 = 21 × 12/7 × 12 = 252/84
  4. Subtract the two like fractions:
    49/84 - 252/84 = 49 - 252/84 = -203/84
  5. After reducing the fraction, the answer is -29/12

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