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Add 21/42 and 7/54

21/42 + 7/54 is 17/27.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 54 is 378

    Next, find the equivalent fraction of both fractional numbers with denominator 378
  2. For the 1st fraction, since 42 × 9 = 378,
    21/42 = 21 × 9/42 × 9 = 189/378
  3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
    7/54 = 7 × 7/54 × 7 = 49/378
  4. Add the two like fractions:
    189/378 + 49/378 = 189 + 49/378 = 238/378
  5. 238/378 simplified gives 17/27
  6. So, 21/42 + 7/54 = 17/27

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