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Add 1/21 and 42/54

1/21 + 42/54 is 52/63.

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,
    1/21 = 1 × 18/21 × 18 = 18/378
  3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
    42/54 = 42 × 7/54 × 7 = 294/378
  4. Add the two like fractions:
    18/378 + 294/378 = 18 + 294/378 = 312/378
  5. 312/378 simplified gives 52/63
  6. So, 1/21 + 42/54 = 52/63

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