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Subtract 35/81 from 28/40

28/40 - 35/81 is 217/810.

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,
    28/40 = 28 × 81/40 × 81 = 2268/3240
  3. Likewise, for the 2nd fraction, since 81 × 40 = 3240,
    35/81 = 35 × 40/81 × 40 = 1400/3240
  4. Subtract the two like fractions:
    2268/3240 - 1400/3240 = 2268 - 1400/3240 = 868/3240
  5. After reducing the fraction, the answer is 217/810

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