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Add 21/40 and 16/81

21/40 + 16/81 is 2341/3240.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 81 is 3240

    Next, find the equivalent fraction of both fractional numbers with denominator 3240
  2. For the 1st fraction, since 40 × 81 = 3240,
    21/40 = 21 × 81/40 × 81 = 1701/3240
  3. Likewise, for the 2nd fraction, since 81 × 40 = 3240,
    16/81 = 16 × 40/81 × 40 = 640/3240
  4. Add the two like fractions:
    1701/3240 + 640/3240 = 1701 + 640/3240 = 2341/3240
  5. So, 21/40 + 16/81 = 2341/3240

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