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Add 12/20 and 36/21

1st number: 12/20, 2nd number: 1 15/21

12/20 + 36/21 is 81/35.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 21 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 20 × 21 = 420,
    12/20 = 12 × 21/20 × 21 = 252/420
  3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
    36/21 = 36 × 20/21 × 20 = 720/420
  4. Add the two like fractions:
    252/420 + 720/420 = 252 + 720/420 = 972/420
  5. 972/420 simplified gives 81/35
  6. So, 12/20 + 36/21 = 81/35
    In mixed form: 211/35

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