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Add 6/21 and 42/54

6/21 + 42/54 is 67/63.

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,
    6/21 = 6 × 18/21 × 18 = 108/378
  3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
    42/54 = 42 × 7/54 × 7 = 294/378
  4. Add the two like fractions:
    108/378 + 294/378 = 108 + 294/378 = 402/378
  5. 402/378 simplified gives 67/63
  6. So, 6/21 + 42/54 = 67/63
    In mixed form: 14/63

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