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Subtract 2/81 from 4/8

4/8 - 2/81 is 77/162.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 81 is 648
  2. For the 1st fraction, since 8 × 81 = 648,
    4/8 = 4 × 81/8 × 81 = 324/648
  3. Likewise, for the 2nd fraction, since 81 × 8 = 648,
    2/81 = 2 × 8/81 × 8 = 16/648
  4. Subtract the two fractions:
    324/648 - 16/648 = 324 - 16/648 = 308/648
  5. After reducing the fraction, the answer is 77/162

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