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Add 21/81 and 27/20

1st number: 21/81, 2nd number: 1 7/20

21/81 + 27/20 is 869/540.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 81 and 20 is 1620

    Next, find the equivalent fraction of both fractional numbers with denominator 1620
  2. For the 1st fraction, since 81 × 20 = 1620,
    21/81 = 21 × 20/81 × 20 = 420/1620
  3. Likewise, for the 2nd fraction, since 20 × 81 = 1620,
    27/20 = 27 × 81/20 × 81 = 2187/1620
  4. Add the two like fractions:
    420/1620 + 2187/1620 = 420 + 2187/1620 = 2607/1620
  5. 2607/1620 simplified gives 869/540
  6. So, 21/81 + 27/20 = 869/540
    In mixed form: 1329/540

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