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Subtract 25/81 from 3/40

3/40 - 25/81 is -757/3240.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 81 is 3240

    Next, find the equivalent fraction of both fractional numbers with denominator 3240
  2. For the 1st fraction, since 40 × 81 = 3240,
    3/40 = 3 × 81/40 × 81 = 243/3240
  3. Likewise, for the 2nd fraction, since 81 × 40 = 3240,
    25/81 = 25 × 40/81 × 40 = 1000/3240
  4. Subtract the two like fractions:
    243/3240 - 1000/3240 = 243 - 1000/3240 = -757/3240

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