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Add 20/84 and 18/27

20/84 + 18/27 is 19/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 27 is 756
  2. For the 1st fraction, since 84 × 9 = 756,
    20/84 = 20 × 9/84 × 9 = 180/756
  3. Likewise, for the 2nd fraction, since 27 × 28 = 756,
    18/27 = 18 × 28/27 × 28 = 504/756
  4. Add the two fractions:
    180/756 + 504/756 = 180 + 504/756 = 684/756
  5. 684/756 simplified gives 19/21
  6. So, 20/84 + 18/27 = 19/21

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