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Add 25/28 and 21/27

25/28 + 21/27 is 421/252.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 27 is 756

    Next, find the equivalent fraction of both fractional numbers with denominator 756
  2. For the 1st fraction, since 28 × 27 = 756,
    25/28 = 25 × 27/28 × 27 = 675/756
  3. Likewise, for the 2nd fraction, since 27 × 28 = 756,
    21/27 = 21 × 28/27 × 28 = 588/756
  4. Add the two like fractions:
    675/756 + 588/756 = 675 + 588/756 = 1263/756
  5. 1263/756 simplified gives 421/252
  6. So, 25/28 + 21/27 = 421/252
    In mixed form: 1169/252

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