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Subtract 12/30 from 5/70

5/70 - 12/30 is -23/70.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 30 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 70 × 3 = 210,
    5/70 = 5 × 3/70 × 3 = 15/210
  3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
    12/30 = 12 × 7/30 × 7 = 84/210
  4. Subtract the two like fractions:
    15/210 - 84/210 = 15 - 84/210 = -69/210
  5. After reducing the fraction, the answer is -23/70

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