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Subtract 7/81 from 81/80

1st number: 1 1/80, 2nd number: 7/81

81/80 - 7/81 is 6001/6480.

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,
    81/80 = 81 × 81/80 × 81 = 6561/6480
  3. Likewise, for the 2nd fraction, since 81 × 80 = 6480,
    7/81 = 7 × 80/81 × 80 = 560/6480
  4. Subtract the two fractions:
    6561/6480 - 560/6480 = 6561 - 560/6480 = 6001/6480

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