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Add 28/12 and 15/90

1st number: 2 4/12, 2nd number: 15/90

28/12 + 15/90 is 5/2.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 90 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 12 × 15 = 180,
    28/12 = 28 × 15/12 × 15 = 420/180
  3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
    15/90 = 15 × 2/90 × 2 = 30/180
  4. Add the two like fractions:
    420/180 + 30/180 = 420 + 30/180 = 450/180
  5. 450/180 simplified gives 5/2
  6. So, 28/12 + 15/90 = 5/2
    In mixed form: 21/2

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