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Add 21/49 and 10/81

21/49 + 10/81 is 313/567.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 49 and 81 is 3969

    Next, find the equivalent fraction of both fractional numbers with denominator 3969
  2. For the 1st fraction, since 49 × 81 = 3969,
    21/49 = 21 × 81/49 × 81 = 1701/3969
  3. Likewise, for the 2nd fraction, since 81 × 49 = 3969,
    10/81 = 10 × 49/81 × 49 = 490/3969
  4. Add the two like fractions:
    1701/3969 + 490/3969 = 1701 + 490/3969 = 2191/3969
  5. 2191/3969 simplified gives 313/567
  6. So, 21/49 + 10/81 = 313/567

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