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Add 36/54 and 15/21

36/54 + 15/21 is 29/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 54 and 21 is 378

    Next, find the equivalent fraction of both fractional numbers with denominator 378
  2. For the 1st fraction, since 54 × 7 = 378,
    36/54 = 36 × 7/54 × 7 = 252/378
  3. Likewise, for the 2nd fraction, since 21 × 18 = 378,
    15/21 = 15 × 18/21 × 18 = 270/378
  4. Add the two like fractions:
    252/378 + 270/378 = 252 + 270/378 = 522/378
  5. 522/378 simplified gives 29/21
  6. So, 36/54 + 15/21 = 29/21
    In mixed form: 18/21

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