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Subtract 18/40 from 1/70

1/70 - 18/40 is -61/140.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 40 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 70 × 4 = 280,
    1/70 = 1 × 4/70 × 4 = 4/280
  3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
    18/40 = 18 × 7/40 × 7 = 126/280
  4. Subtract the two like fractions:
    4/280 - 126/280 = 4 - 126/280 = -122/280
  5. After reducing the fraction, the answer is -61/140

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