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Subtract 80/7 from 30/18

1st number: 1 12/18, 2nd number: 11 3/7

30/18 - 80/7 is -205/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 7 is 126
  2. For the 1st fraction, since 18 × 7 = 126,
    30/18 = 30 × 7/18 × 7 = 210/126
  3. Likewise, for the 2nd fraction, since 7 × 18 = 126,
    80/7 = 80 × 18/7 × 18 = 1440/126
  4. Subtract the two fractions:
    210/126 - 1440/126 = 210 - 1440/126 = -1230/126
  5. After reducing the fraction, the answer is -205/21

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