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Subtract 27/16 from 1/21

1st number: 1/21, 2nd number: 1 11/16

1/21 - 27/16 is -551/336.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 16 is 336

    Next, find the equivalent fraction of both fractional numbers with denominator 336
  2. For the 1st fraction, since 21 × 16 = 336,
    1/21 = 1 × 16/21 × 16 = 16/336
  3. Likewise, for the 2nd fraction, since 16 × 21 = 336,
    27/16 = 27 × 21/16 × 21 = 567/336
  4. Subtract the two like fractions:
    16/336 - 567/336 = 16 - 567/336 = -551/336

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