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Add 5/21 and 12/54

5/21 + 12/54 is 29/63.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 378
  2. For the 1st fraction, since 21 × 18 = 378,
    5/21 = 5 × 18/21 × 18 = 90/378
  3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
    12/54 = 12 × 7/54 × 7 = 84/378
  4. Add the two like fractions:
    90/378 + 84/378 = 90 + 84/378 = 174/378
  5. 174/378 simplified gives 29/63
  6. So, 5/21 + 12/54 = 29/63

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