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Subtract 7/40 from 3/7

3/7 - 7/40 is 71/280.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 40 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 7 × 40 = 280,
    3/7 = 3 × 40/7 × 40 = 120/280
  3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
    7/40 = 7 × 7/40 × 7 = 49/280
  4. Subtract the two like fractions:
    120/280 - 49/280 = 120 - 49/280 = 71/280

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