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Add 18/60 and 21/56

18/60 + 21/56 is 27/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 60 and 56 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 60 × 14 = 840,
    18/60 = 18 × 14/60 × 14 = 252/840
  3. Likewise, for the 2nd fraction, since 56 × 15 = 840,
    21/56 = 21 × 15/56 × 15 = 315/840
  4. Add the two like fractions:
    252/840 + 315/840 = 252 + 315/840 = 567/840
  5. 567/840 simplified gives 27/40
  6. So, 18/60 + 21/56 = 27/40

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