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Add 4/21 and 7/81

4/21 + 7/81 is 157/567.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 81 is 567
  2. For the 1st fraction, since 21 × 27 = 567,
    4/21 = 4 × 27/21 × 27 = 108/567
  3. Likewise, for the 2nd fraction, since 81 × 7 = 567,
    7/81 = 7 × 7/81 × 7 = 49/567
  4. Add the two fractions:
    108/567 + 49/567 = 108 + 49/567 = 157/567
  5. So, 4/21 + 7/81 = 157/567

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