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Subtract 7/70 from 1/40

1/40 - 7/70 is -3/40.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 40 × 7 = 280,
    1/40 = 1 × 7/40 × 7 = 7/280
  3. Likewise, for the 2nd fraction, since 70 × 4 = 280,
    7/70 = 7 × 4/70 × 4 = 28/280
  4. Subtract the two like fractions:
    7/280 - 28/280 = 7 - 28/280 = -21/280
  5. After reducing the fraction, the answer is -3/40

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