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Subtract 20/5 from 81/4

1st number: 20 1/4, 2nd number: 4 0/5

81/4 - 20/5 is 65/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 5 is 20

    Next, find the equivalent fraction of both fractional numbers with denominator 20
  2. For the 1st fraction, since 4 × 5 = 20,
    81/4 = 81 × 5/4 × 5 = 405/20
  3. Likewise, for the 2nd fraction, since 5 × 4 = 20,
    20/5 = 20 × 4/5 × 4 = 80/20
  4. Subtract the two like fractions:
    405/20 - 80/20 = 405 - 80/20 = 325/20
  5. After reducing the fraction, the answer is 65/4
  6. In mixed form: 161/4

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