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Add 21/54 and 7/56

21/54 + 7/56 is 37/72.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 1512
  2. For the 1st fraction, since 54 × 28 = 1512,
    21/54 = 21 × 28/54 × 28 = 588/1512
  3. Likewise, for the 2nd fraction, since 56 × 27 = 1512,
    7/56 = 7 × 27/56 × 27 = 189/1512
  4. Add the two like fractions:
    588/1512 + 189/1512 = 588 + 189/1512 = 777/1512
  5. 777/1512 simplified gives 37/72
  6. So, 21/54 + 7/56 = 37/72

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