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Add 28/21 and 21/36

1st number: 1 7/21, 2nd number: 21/36

28/21 + 21/36 is 23/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 36 is 252

    Next, find the equivalent fraction of both fractional numbers with denominator 252
  2. For the 1st fraction, since 21 × 12 = 252,
    28/21 = 28 × 12/21 × 12 = 336/252
  3. Likewise, for the 2nd fraction, since 36 × 7 = 252,
    21/36 = 21 × 7/36 × 7 = 147/252
  4. Add the two like fractions:
    336/252 + 147/252 = 336 + 147/252 = 483/252
  5. 483/252 simplified gives 23/12
  6. So, 28/21 + 21/36 = 23/12
    In mixed form: 111/12

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