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Subtract 18/70 from 1/7

1/7 - 18/70 is -4/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 70 is 70

    Next, find the equivalent fraction of both fractional numbers with denominator 70
  2. For the 1st fraction, since 7 × 10 = 70,
    1/7 = 1 × 10/7 × 10 = 10/70
  3. Likewise, for the 2nd fraction, since 70 × 1 = 70,
    18/70 = 18 × 1/70 × 1 = 18/70
  4. Subtract the two like fractions:
    10/70 - 18/70 = 10 - 18/70 = -8/70
  5. After reducing the fraction, the answer is -4/35

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