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Add 3/28 and 9/15

3/28 + 9/15 is 99/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 15 is 420
  2. For the 1st fraction, since 28 × 15 = 420,
    3/28 = 3 × 15/28 × 15 = 45/420
  3. Likewise, for the 2nd fraction, since 15 × 28 = 420,
    9/15 = 9 × 28/15 × 28 = 252/420
  4. Add the two fractions:
    45/420 + 252/420 = 45 + 252/420 = 297/420
  5. After reducing the fraction, the answer is 99/140

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