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Add 21/54 and 9/21

21/54 + 9/21 is 103/126.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 378
  2. For the 1st fraction, since 54 × 7 = 378,
    21/54 = 21 × 7/54 × 7 = 147/378
  3. Likewise, for the 2nd fraction, since 21 × 18 = 378,
    9/21 = 9 × 18/21 × 18 = 162/378
  4. Add the two like fractions:
    147/378 + 162/378 = 147 + 162/378 = 309/378
  5. 309/378 simplified gives 103/126
  6. So, 21/54 + 9/21 = 103/126

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