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Add 9/20 and 12/90

9/20 + 12/90 is 7/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 90 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 20 × 9 = 180,
    9/20 = 9 × 9/20 × 9 = 81/180
  3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
    12/90 = 12 × 2/90 × 2 = 24/180
  4. Add the two like fractions:
    81/180 + 24/180 = 81 + 24/180 = 105/180
  5. 105/180 simplified gives 7/12
  6. So, 9/20 + 12/90 = 7/12

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