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Subtract 1/21 from 63/54

1st number: 1 9/54, 2nd number: 1/21

63/54 - 1/21 is 47/42.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 54 and 21 is 378

    Next, find the equivalent fraction of both fractional numbers with denominator 378
  2. For the 1st fraction, since 54 × 7 = 378,
    63/54 = 63 × 7/54 × 7 = 441/378
  3. Likewise, for the 2nd fraction, since 21 × 18 = 378,
    1/21 = 1 × 18/21 × 18 = 18/378
  4. Subtract the two like fractions:
    441/378 - 18/378 = 441 - 18/378 = 423/378
  5. After reducing the fraction, the answer is 47/42
  6. In mixed form: 15/42

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