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Subtract 70/81 from 54/80

54/80 - 70/81 is -613/3240.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 81 is 6480
  2. For the 1st fraction, since 80 × 81 = 6480,
    54/80 = 54 × 81/80 × 81 = 4374/6480
  3. Likewise, for the 2nd fraction, since 81 × 80 = 6480,
    70/81 = 70 × 80/81 × 80 = 5600/6480
  4. Subtract the two fractions:
    4374/6480 - 5600/6480 = 4374 - 5600/6480 = -1226/6480
  5. After reducing the fraction, the answer is -613/3240

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