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Add 18/20 and 24/27

18/20 + 24/27 is 161/90.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 27 is 540

    Next, find the equivalent fraction of both fractional numbers with denominator 540
  2. For the 1st fraction, since 20 × 27 = 540,
    18/20 = 18 × 27/20 × 27 = 486/540
  3. Likewise, for the 2nd fraction, since 27 × 20 = 540,
    24/27 = 24 × 20/27 × 20 = 480/540
  4. Add the two like fractions:
    486/540 + 480/540 = 486 + 480/540 = 966/540
  5. 966/540 simplified gives 161/90
  6. So, 18/20 + 24/27 = 161/90
    In mixed form: 171/90

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