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Subtract 4/63 from 21/12

1st number: 1 9/12, 2nd number: 4/63

21/12 - 4/63 is 425/252.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 63 is 252

    Next, find the equivalent fraction of both fractional numbers with denominator 252
  2. For the 1st fraction, since 12 × 21 = 252,
    21/12 = 21 × 21/12 × 21 = 441/252
  3. Likewise, for the 2nd fraction, since 63 × 4 = 252,
    4/63 = 4 × 4/63 × 4 = 16/252
  4. Subtract the two like fractions:
    441/252 - 16/252 = 441 - 16/252 = 425/252
  5. In mixed form: 1173/252

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