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Subtract 21/20 from 84/9

1st number: 9 3/9, 2nd number: 1 1/20

84/9 - 21/20 is 497/60.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 20 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 9 × 20 = 180,
    84/9 = 84 × 20/9 × 20 = 1680/180
  3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
    21/20 = 21 × 9/20 × 9 = 189/180
  4. Subtract the two like fractions:
    1680/180 - 189/180 = 1680 - 189/180 = 1491/180
  5. After reducing the fraction, the answer is 497/60
  6. In mixed form: 817/60

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