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Subtract 4/7 from 81/4

1st number: 20 1/4, 2nd number: 4/7

81/4 - 4/7 is 551/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 7 is 28

    Next, find the equivalent fraction of both fractional numbers with denominator 28
  2. For the 1st fraction, since 4 × 7 = 28,
    81/4 = 81 × 7/4 × 7 = 567/28
  3. Likewise, for the 2nd fraction, since 7 × 4 = 28,
    4/7 = 4 × 4/7 × 4 = 16/28
  4. Subtract the two like fractions:
    567/28 - 16/28 = 567 - 16/28 = 551/28
  5. In mixed form: 1919/28

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