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Subtract 18/21 from 81/16

1st number: 5 1/16, 2nd number: 18/21

81/16 - 18/21 is 471/112.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 336
  2. For the 1st fraction, since 16 × 21 = 336,
    81/16 = 81 × 21/16 × 21 = 1701/336
  3. Likewise, for the 2nd fraction, since 21 × 16 = 336,
    18/21 = 18 × 16/21 × 16 = 288/336
  4. Subtract the two like fractions:
    1701/336 - 288/336 = 1701 - 288/336 = 1413/336
  5. After reducing the fraction, the answer is 471/112
  6. In mixed form: 423/112

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