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Subtract 4/21 from 64/5

1st number: 12 4/5, 2nd number: 4/21

64/5 - 4/21 is 1324/105.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 21 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 5 × 21 = 105,
    64/5 = 64 × 21/5 × 21 = 1344/105
  3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
    4/21 = 4 × 5/21 × 5 = 20/105
  4. Subtract the two like fractions:
    1344/105 - 20/105 = 1344 - 20/105 = 1324/105
  5. In mixed form: 1264/105

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