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Add 1/81 and 21/8

1st number: 1/81, 2nd number: 2 5/8

1/81 + 21/8 is 1709/648.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 81 and 8 is 648

    Next, find the equivalent fraction of both fractional numbers with denominator 648
  2. For the 1st fraction, since 81 × 8 = 648,
    1/81 = 1 × 8/81 × 8 = 8/648
  3. Likewise, for the 2nd fraction, since 8 × 81 = 648,
    21/8 = 21 × 81/8 × 81 = 1701/648
  4. Add the two like fractions:
    8/648 + 1701/648 = 8 + 1701/648 = 1709/648
  5. So, 1/81 + 21/8 = 1709/648
    In mixed form: 2413/648

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