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Add 21/15 and 30/81

1st number: 1 6/15, 2nd number: 30/81

21/15 + 30/81 is 239/135.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 81 is 405
  2. For the 1st fraction, since 15 × 27 = 405,
    21/15 = 21 × 27/15 × 27 = 567/405
  3. Likewise, for the 2nd fraction, since 81 × 5 = 405,
    30/81 = 30 × 5/81 × 5 = 150/405
  4. Add the two fractions:
    567/405 + 150/405 = 567 + 150/405 = 717/405
  5. After reducing the fraction, the answer is 239/135
  6. In mixed form: 1104/135

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