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Add 15/20 and 40/54

15/20 + 40/54 is 161/108.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 54 is 540

    Next, find the equivalent fraction of both fractional numbers with denominator 540
  2. For the 1st fraction, since 20 × 27 = 540,
    15/20 = 15 × 27/20 × 27 = 405/540
  3. Likewise, for the 2nd fraction, since 54 × 10 = 540,
    40/54 = 40 × 10/54 × 10 = 400/540
  4. Add the two like fractions:
    405/540 + 400/540 = 405 + 400/540 = 805/540
  5. 805/540 simplified gives 161/108
  6. So, 15/20 + 40/54 = 161/108
    In mixed form: 153/108

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