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Add 18/60 and 15/20

18/60 + 15/20 is 21/20.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 60 × 1 = 60,
    18/60 = 18 × 1/60 × 1 = 18/60
  3. Likewise, for the 2nd fraction, since 20 × 3 = 60,
    15/20 = 15 × 3/20 × 3 = 45/60
  4. Add the two like fractions:
    18/60 + 45/60 = 18 + 45/60 = 63/60
  5. 63/60 simplified gives 21/20
  6. So, 18/60 + 15/20 = 21/20
    In mixed form: 11/20

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