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Add 21/56 and 15/54

21/56 + 15/54 is 47/72.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 56 and 54 is 1512

    Next, find the equivalent fraction of both fractional numbers with denominator 1512
  2. For the 1st fraction, since 56 × 27 = 1512,
    21/56 = 21 × 27/56 × 27 = 567/1512
  3. Likewise, for the 2nd fraction, since 54 × 28 = 1512,
    15/54 = 15 × 28/54 × 28 = 420/1512
  4. Add the two like fractions:
    567/1512 + 420/1512 = 567 + 420/1512 = 987/1512
  5. 987/1512 simplified gives 47/72
  6. So, 21/56 + 15/54 = 47/72

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