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Add 27/60 and 54/90

27/60 + 54/90 is 21/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 60 and 90 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 60 × 3 = 180,
    27/60 = 27 × 3/60 × 3 = 81/180
  3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
    54/90 = 54 × 2/90 × 2 = 108/180
  4. Add the two like fractions:
    81/180 + 108/180 = 81 + 108/180 = 189/180
  5. 189/180 simplified gives 21/20
  6. So, 27/60 + 54/90 = 21/20
    In mixed form: 11/20

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