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Subtract 6/20 from 21/5

1st number: 4 1/5, 2nd number: 6/20

21/5 - 6/20 is 39/10.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 20 is 20
  2. For the 1st fraction, since 5 × 4 = 20,
    21/5 = 21 × 4/5 × 4 = 84/20
  3. Likewise, for the 2nd fraction, since 20 × 1 = 20,
    6/20 = 6 × 1/20 × 1 = 6/20
  4. Subtract the two fractions:
    84/20 - 6/20 = 84 - 6/20 = 78/20
  5. After reducing the fraction, the answer is 39/10
  6. In mixed form: 39/10

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