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Add 12/18 and 25/40

12/18 + 25/40 is 31/24.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 40 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 18 × 20 = 360,
    12/18 = 12 × 20/18 × 20 = 240/360
  3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
    25/40 = 25 × 9/40 × 9 = 225/360
  4. Add the two like fractions:
    240/360 + 225/360 = 240 + 225/360 = 465/360
  5. 465/360 simplified gives 31/24
  6. So, 12/18 + 25/40 = 31/24
    In mixed form: 17/24

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