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Add 21/84 and 27/15

1st number: 21/84, 2nd number: 1 12/15

21/84 + 27/15 is 41/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 15 is 420
  2. For the 1st fraction, since 84 × 5 = 420,
    21/84 = 21 × 5/84 × 5 = 105/420
  3. Likewise, for the 2nd fraction, since 15 × 28 = 420,
    27/15 = 27 × 28/15 × 28 = 756/420
  4. Add the two fractions:
    105/420 + 756/420 = 105 + 756/420 = 861/420
  5. 861/420 simplified gives 41/20
  6. So, 21/84 + 27/15 = 41/20
    In mixed form: 21/20

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