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Subtract 7/20 from 21/6

1st number: 3 3/6, 2nd number: 7/20

21/6 - 7/20 is 63/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 6 and 20 is 60
  2. For the 1st fraction, since 6 × 10 = 60,
    21/6 = 21 × 10/6 × 10 = 210/60
  3. Likewise, for the 2nd fraction, since 20 × 3 = 60,
    7/20 = 7 × 3/20 × 3 = 21/60
  4. Subtract the two fractions:
    210/60 - 21/60 = 210 - 21/60 = 189/60
  5. After reducing the fraction, the answer is 63/20
  6. In mixed form: 33/20

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