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Add 21/28 and 6/9

21/28 + 6/9 is 17/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 9 is 252

    Next, find the equivalent fraction of both fractional numbers with denominator 252
  2. For the 1st fraction, since 28 × 9 = 252,
    21/28 = 21 × 9/28 × 9 = 189/252
  3. Likewise, for the 2nd fraction, since 9 × 28 = 252,
    6/9 = 6 × 28/9 × 28 = 168/252
  4. Add the two like fractions:
    189/252 + 168/252 = 189 + 168/252 = 357/252
  5. 357/252 simplified gives 17/12
  6. So, 21/28 + 6/9 = 17/12
    In mixed form: 15/12

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