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Add 20/21 and 18/36

20/21 + 18/36 is 61/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 36 is 252

    Next, find the equivalent fraction of both fractional numbers with denominator 252
  2. For the 1st fraction, since 21 × 12 = 252,
    20/21 = 20 × 12/21 × 12 = 240/252
  3. Likewise, for the 2nd fraction, since 36 × 7 = 252,
    18/36 = 18 × 7/36 × 7 = 126/252
  4. Add the two like fractions:
    240/252 + 126/252 = 240 + 126/252 = 366/252
  5. 366/252 simplified gives 61/42
  6. So, 20/21 + 18/36 = 61/42
    In mixed form: 119/42

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