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Subtract 40/21 from 21/2

1st number: 10 1/2, 2nd number: 1 19/21

21/2 - 40/21 is 361/42.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 21 is 42

    Next, find the equivalent fraction of both fractional numbers with denominator 42
  2. For the 1st fraction, since 2 × 21 = 42,
    21/2 = 21 × 21/2 × 21 = 441/42
  3. Likewise, for the 2nd fraction, since 21 × 2 = 42,
    40/21 = 40 × 2/21 × 2 = 80/42
  4. Subtract the two like fractions:
    441/42 - 80/42 = 441 - 80/42 = 361/42
  5. In mixed form: 825/42

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