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Add 15/40 and 21/36

15/40 + 21/36 is 23/24.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 36 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 40 × 9 = 360,
    15/40 = 15 × 9/40 × 9 = 135/360
  3. Likewise, for the 2nd fraction, since 36 × 10 = 360,
    21/36 = 21 × 10/36 × 10 = 210/360
  4. Add the two like fractions:
    135/360 + 210/360 = 135 + 210/360 = 345/360
  5. 345/360 simplified gives 23/24
  6. So, 15/40 + 21/36 = 23/24

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