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Add 7/15 and 9/28

7/15 + 9/28 is 331/420.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 28 is 420
  2. For the 1st fraction, since 15 × 28 = 420,
    7/15 = 7 × 28/15 × 28 = 196/420
  3. Likewise, for the 2nd fraction, since 28 × 15 = 420,
    9/28 = 9 × 15/28 × 15 = 135/420
  4. Add the two fractions:
    196/420 + 135/420 = 196 + 135/420 = 331/420

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