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Add 12/21 and 48/54

12/21 + 48/54 is 92/63.

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,
    12/21 = 12 × 18/21 × 18 = 216/378
  3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
    48/54 = 48 × 7/54 × 7 = 336/378
  4. Add the two like fractions:
    216/378 + 336/378 = 216 + 336/378 = 552/378
  5. 552/378 simplified gives 92/63
  6. So, 12/21 + 48/54 = 92/63
    In mixed form: 129/63

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