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Subtract 3/5 from 81/2

1st number: 40 1/2, 2nd number: 3/5

81/2 - 3/5 is 399/10.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 5 is 10

    Next, find the equivalent fraction of both fractional numbers with denominator 10
  2. For the 1st fraction, since 2 × 5 = 10,
    81/2 = 81 × 5/2 × 5 = 405/10
  3. Likewise, for the 2nd fraction, since 5 × 2 = 10,
    3/5 = 3 × 2/5 × 2 = 6/10
  4. Subtract the two like fractions:
    405/10 - 6/10 = 405 - 6/10 = 399/10
  5. In mixed form: 399/10

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