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Add 10/81 and 21/20

1st number: 10/81, 2nd number: 1 1/20

10/81 + 21/20 is 1901/1620.

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,
    10/81 = 10 × 20/81 × 20 = 200/1620
  3. Likewise, for the 2nd fraction, since 20 × 81 = 1620,
    21/20 = 21 × 81/20 × 81 = 1701/1620
  4. Add the two like fractions:
    200/1620 + 1701/1620 = 200 + 1701/1620 = 1901/1620
  5. So, 10/81 + 21/20 = 1901/1620
    In mixed form: 1281/1620

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