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Add 15/25 and 9/28

15/25 + 9/28 is 129/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 25 and 28 is 700

    Next, find the equivalent fraction of both fractional numbers with denominator 700
  2. For the 1st fraction, since 25 × 28 = 700,
    15/25 = 15 × 28/25 × 28 = 420/700
  3. Likewise, for the 2nd fraction, since 28 × 25 = 700,
    9/28 = 9 × 25/28 × 25 = 225/700
  4. Add the two like fractions:
    420/700 + 225/700 = 420 + 225/700 = 645/700
  5. 645/700 simplified gives 129/140
  6. So, 15/25 + 9/28 = 129/140

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