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Add 21/27 and 35/90

21/27 + 35/90 is 7/6.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 27 and 90 is 270

    Next, find the equivalent fraction of both fractional numbers with denominator 270
  2. For the 1st fraction, since 27 × 10 = 270,
    21/27 = 21 × 10/27 × 10 = 210/270
  3. Likewise, for the 2nd fraction, since 90 × 3 = 270,
    35/90 = 35 × 3/90 × 3 = 105/270
  4. Add the two like fractions:
    210/270 + 105/270 = 210 + 105/270 = 315/270
  5. 315/270 simplified gives 7/6
  6. So, 21/27 + 35/90 = 7/6
    In mixed form: 11/6

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