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Add 21/81 and 2/40

21/81 + 2/40 is 167/540.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 3240
  2. For the 1st fraction, since 81 × 40 = 3240,
    21/81 = 21 × 40/81 × 40 = 840/3240
  3. Likewise, for the 2nd fraction, since 40 × 81 = 3240,
    2/40 = 2 × 81/40 × 81 = 162/3240
  4. Add the two like fractions:
    840/3240 + 162/3240 = 840 + 162/3240 = 1002/3240
  5. 1002/3240 simplified gives 167/540
  6. So, 21/81 + 2/40 = 167/540

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