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Add 9/54 and 15/42

9/54 + 15/42 is 11/21.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 378
  2. For the 1st fraction, since 54 × 7 = 378,
    9/54 = 9 × 7/54 × 7 = 63/378
  3. Likewise, for the 2nd fraction, since 42 × 9 = 378,
    15/42 = 15 × 9/42 × 9 = 135/378
  4. Add the two like fractions:
    63/378 + 135/378 = 63 + 135/378 = 198/378
  5. 198/378 simplified gives 11/21
  6. So, 9/54 + 15/42 = 11/21

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