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Add 7/21 and 21/54

7/21 + 21/54 is 13/18.

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,
    7/21 = 7 × 18/21 × 18 = 126/378
  3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
    21/54 = 21 × 7/54 × 7 = 147/378
  4. Add the two like fractions:
    126/378 + 147/378 = 126 + 147/378 = 273/378
  5. 273/378 simplified gives 13/18
  6. So, 7/21 + 21/54 = 13/18

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