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Subtract 18/81 from 9/5

1st number: 1 4/5, 2nd number: 18/81

9/5 - 18/81 is 71/45.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 405
  2. For the 1st fraction, since 5 × 81 = 405,
    9/5 = 9 × 81/5 × 81 = 729/405
  3. Likewise, for the 2nd fraction, since 81 × 5 = 405,
    18/81 = 18 × 5/81 × 5 = 90/405
  4. Subtract the two like fractions:
    729/405 - 90/405 = 729 - 90/405 = 639/405
  5. After reducing the fraction, the answer is 71/45
  6. In mixed form: 126/45

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