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Add 18/54 and 12/63

18/54 + 12/63 is 11/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 54 and 63 is 378

    Next, find the equivalent fraction of both fractional numbers with denominator 378
  2. For the 1st fraction, since 54 × 7 = 378,
    18/54 = 18 × 7/54 × 7 = 126/378
  3. Likewise, for the 2nd fraction, since 63 × 6 = 378,
    12/63 = 12 × 6/63 × 6 = 72/378
  4. Add the two like fractions:
    126/378 + 72/378 = 126 + 72/378 = 198/378
  5. 198/378 simplified gives 11/21
  6. So, 18/54 + 12/63 = 11/21

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