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Subtract 63/54 from 4/21

1st number: 4/21, 2nd number: 1 9/54

4/21 - 63/54 is -41/42.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 378
  2. For the 1st fraction, since 21 × 18 = 378,
    4/21 = 4 × 18/21 × 18 = 72/378
  3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
    63/54 = 63 × 7/54 × 7 = 441/378
  4. Subtract the two like fractions:
    72/378 - 441/378 = 72 - 441/378 = -369/378
  5. After reducing the fraction, the answer is -41/42

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