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Add 21/36 and 5/21

21/36 + 5/21 is 23/28.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 252
  2. For the 1st fraction, since 36 × 7 = 252,
    21/36 = 21 × 7/36 × 7 = 147/252
  3. Likewise, for the 2nd fraction, since 21 × 12 = 252,
    5/21 = 5 × 12/21 × 12 = 60/252
  4. Add the two like fractions:
    147/252 + 60/252 = 147 + 60/252 = 207/252
  5. 207/252 simplified gives 23/28
  6. So, 21/36 + 5/21 = 23/28

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