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Subtract 30/35 from 12/20

12/20 - 30/35 is -9/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 35 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 20 × 7 = 140,
    12/20 = 12 × 7/20 × 7 = 84/140
  3. Likewise, for the 2nd fraction, since 35 × 4 = 140,
    30/35 = 30 × 4/35 × 4 = 120/140
  4. Subtract the two like fractions:
    84/140 - 120/140 = 84 - 120/140 = -36/140
  5. After reducing the fraction, the answer is -9/35

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