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Add 12/20 and 27/90

12/20 + 27/90 is 9/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 90 is 180
  2. For the 1st fraction, since 20 × 9 = 180,
    12/20 = 12 × 9/20 × 9 = 108/180
  3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
    27/90 = 27 × 2/90 × 2 = 54/180
  4. Add the two fractions:
    108/180 + 54/180 = 108 + 54/180 = 162/180
  5. 162/180 simplified gives 9/10
  6. So, 12/20 + 27/90 = 9/10

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