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Subtract 9/5 from 1/81

1st number: 1/81, 2nd number: 1 4/5

1/81 - 9/5 is -724/405.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 81 and 5 is 405

    Next, find the equivalent fraction of both fractional numbers with denominator 405
  2. For the 1st fraction, since 81 × 5 = 405,
    1/81 = 1 × 5/81 × 5 = 5/405
  3. Likewise, for the 2nd fraction, since 5 × 81 = 405,
    9/5 = 9 × 81/5 × 81 = 729/405
  4. Subtract the two like fractions:
    5/405 - 729/405 = 5 - 729/405 = -724/405

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