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Add 27/60 and 21/40

27/60 + 21/40 is 39/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 60 and 40 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 60 × 2 = 120,
    27/60 = 27 × 2/60 × 2 = 54/120
  3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
    21/40 = 21 × 3/40 × 3 = 63/120
  4. Add the two like fractions:
    54/120 + 63/120 = 54 + 63/120 = 117/120
  5. 117/120 simplified gives 39/40
  6. So, 27/60 + 21/40 = 39/40

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