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Subtract 80/7 from 30/9

1st number: 3 3/9, 2nd number: 11 3/7

30/9 - 80/7 is -170/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 7 is 63
  2. For the 1st fraction, since 9 × 7 = 63,
    30/9 = 30 × 7/9 × 7 = 210/63
  3. Likewise, for the 2nd fraction, since 7 × 9 = 63,
    80/7 = 80 × 9/7 × 9 = 720/63
  4. Subtract the two fractions:
    210/63 - 720/63 = 210 - 720/63 = -510/63
  5. After reducing the fraction, the answer is -170/21

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