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Subtract 18/20 from 30/35

30/35 - 18/20 is -3/70.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 35 × 4 = 140,
    30/35 = 30 × 4/35 × 4 = 120/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    18/20 = 18 × 7/20 × 7 = 126/140
  4. Subtract the two like fractions:
    120/140 - 126/140 = 120 - 126/140 = -6/140
  5. After reducing the fraction, the answer is -3/70

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