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Subtract 56/9 from 84/21

1st number: 4 0/21, 2nd number: 6 2/9

84/21 - 56/9 is -20/9.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 9 is 63

    Next, find the equivalent fraction of both fractional numbers with denominator 63
  2. For the 1st fraction, since 21 × 3 = 63,
    84/21 = 84 × 3/21 × 3 = 252/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    56/9 = 56 × 7/9 × 7 = 392/63
  4. Subtract the two like fractions:
    252/63 - 392/63 = 252 - 392/63 = -140/63
  5. After reducing the fraction, the answer is -20/9

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