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Add 18/20 and 12/40

18/20 + 12/40 is 6/5.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 40 is 40

    Next, find the equivalent fraction of both fractional numbers with denominator 40
  2. For the 1st fraction, since 20 × 2 = 40,
    18/20 = 18 × 2/20 × 2 = 36/40
  3. Likewise, for the 2nd fraction, since 40 × 1 = 40,
    12/40 = 12 × 1/40 × 1 = 12/40
  4. Add the two like fractions:
    36/40 + 12/40 = 36 + 12/40 = 48/40
  5. 48/40 simplified gives 6/5
  6. So, 18/20 + 12/40 = 6/5
    In mixed form: 11/5

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