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Subtract 1/81 from 2/4

2/4 - 1/81 is 79/162.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 81 is 324

    Next, find the equivalent fraction of both fractional numbers with denominator 324
  2. For the 1st fraction, since 4 × 81 = 324,
    2/4 = 2 × 81/4 × 81 = 162/324
  3. Likewise, for the 2nd fraction, since 81 × 4 = 324,
    1/81 = 1 × 4/81 × 4 = 4/324
  4. Subtract the two like fractions:
    162/324 - 4/324 = 162 - 4/324 = 158/324
  5. After reducing the fraction, the answer is 79/162

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