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Add 15/30 and 18/40

15/30 + 18/40 is 19/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 40 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 30 × 4 = 120,
    15/30 = 15 × 4/30 × 4 = 60/120
  3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
    18/40 = 18 × 3/40 × 3 = 54/120
  4. Add the two like fractions:
    60/120 + 54/120 = 60 + 54/120 = 114/120
  5. 114/120 simplified gives 19/20
  6. So, 15/30 + 18/40 = 19/20

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