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Add 9/40 and 15/28

9/40 + 15/28 is 213/280.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 28 is 280
  2. For the 1st fraction, since 40 × 7 = 280,
    9/40 = 9 × 7/40 × 7 = 63/280
  3. Likewise, for the 2nd fraction, since 28 × 10 = 280,
    15/28 = 15 × 10/28 × 10 = 150/280
  4. Add the two fractions:
    63/280 + 150/280 = 63 + 150/280 = 213/280

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