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Subtract 4/5 from 21/4

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

21/4 - 4/5 is 89/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 5 is 20
  2. For the 1st fraction, since 4 × 5 = 20,
    21/4 = 21 × 5/4 × 5 = 105/20
  3. Likewise, for the 2nd fraction, since 5 × 4 = 20,
    4/5 = 4 × 4/5 × 4 = 16/20
  4. Subtract the two fractions:
    105/20 - 16/20 = 105 - 16/20 = 89/20
  5. In mixed form: 49/20

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