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Subtract 28/9 from 35/21

1st number: 1 14/21, 2nd number: 3 1/9

35/21 - 28/9 is -13/9.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 9 is 63
  2. For the 1st fraction, since 21 × 3 = 63,
    35/21 = 35 × 3/21 × 3 = 105/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    28/9 = 28 × 7/9 × 7 = 196/63
  4. Subtract the two fractions:
    105/63 - 196/63 = 105 - 196/63 = -91/63
  5. After reducing the fraction, the answer is -13/9

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