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Add 15/20 and 54/80

15/20 + 54/80 is 57/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 80 is 80

    Next, find the equivalent fraction of both fractional numbers with denominator 80
  2. For the 1st fraction, since 20 × 4 = 80,
    15/20 = 15 × 4/20 × 4 = 60/80
  3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
    54/80 = 54 × 1/80 × 1 = 54/80
  4. Add the two like fractions:
    60/80 + 54/80 = 60 + 54/80 = 114/80
  5. 114/80 simplified gives 57/40
  6. So, 15/20 + 54/80 = 57/40
    In mixed form: 117/40

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