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Add 12/15 and 1/20

12/15 + 1/20 is 17/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 20 is 60

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 15 × 4 = 60,
    12/15 = 12 × 4/15 × 4 = 48/60
  3. Likewise, for the 2nd fraction, since 20 × 3 = 60,
    1/20 = 1 × 3/20 × 3 = 3/60
  4. Add the two like fractions:
    48/60 + 3/60 = 48 + 3/60 = 51/60
  5. 51/60 simplified gives 17/20
  6. So, 12/15 + 1/20 = 17/20

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