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Add 15/28 and 81/90

15/28 + 81/90 is 201/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 90 is 1260

    Next, find the equivalent fraction of both fractional numbers with denominator 1260
  2. For the 1st fraction, since 28 × 45 = 1260,
    15/28 = 15 × 45/28 × 45 = 675/1260
  3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
    81/90 = 81 × 14/90 × 14 = 1134/1260
  4. Add the two like fractions:
    675/1260 + 1134/1260 = 675 + 1134/1260 = 1809/1260
  5. 1809/1260 simplified gives 201/140
  6. So, 15/28 + 81/90 = 201/140
    In mixed form: 161/140

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