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Subtract 35/9 from 30/21

1st number: 1 9/21, 2nd number: 3 8/9

30/21 - 35/9 is -155/63.

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,
    30/21 = 30 × 3/21 × 3 = 90/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    35/9 = 35 × 7/9 × 7 = 245/63
  4. Subtract the two fractions:
    90/63 - 245/63 = 90 - 245/63 = -155/63

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