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Add 15/56 and 9/40

15/56 + 9/40 is 69/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 56 and 40 is 280
  2. For the 1st fraction, since 56 × 5 = 280,
    15/56 = 15 × 5/56 × 5 = 75/280
  3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
    9/40 = 9 × 7/40 × 7 = 63/280
  4. Add the two fractions:
    75/280 + 63/280 = 75 + 63/280 = 138/280
  5. After reducing the fraction, the answer is 69/140

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