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Add 28/40 and 9/15

28/40 + 9/15 is 13/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 15 is 120
  2. For the 1st fraction, since 40 × 3 = 120,
    28/40 = 28 × 3/40 × 3 = 84/120
  3. Likewise, for the 2nd fraction, since 15 × 8 = 120,
    9/15 = 9 × 8/15 × 8 = 72/120
  4. Add the two fractions:
    84/120 + 72/120 = 84 + 72/120 = 156/120
  5. 156/120 simplified gives 13/10
  6. So, 28/40 + 9/15 = 13/10
    In mixed form: 13/10

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