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Add 3/84 and 9/15

3/84 + 9/15 is 89/140.

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,
    3/84 = 3 × 5/84 × 5 = 15/420
  3. Likewise, for the 2nd fraction, since 15 × 28 = 420,
    9/15 = 9 × 28/15 × 28 = 252/420
  4. Add the two fractions:
    15/420 + 252/420 = 15 + 252/420 = 267/420
  5. After reducing the fraction, the answer is 89/140

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