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Add 20/12 and 35/21

1st number: 1 8/12, 2nd number: 1 14/21

20/12 + 35/21 is 10/3.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 21 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 12 × 7 = 84,
    20/12 = 20 × 7/12 × 7 = 140/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    35/21 = 35 × 4/21 × 4 = 140/84
  4. Add the two like fractions:
    140/84 + 140/84 = 140 + 140/84 = 280/84
  5. 280/84 simplified gives 10/3
  6. So, 20/12 + 35/21 = 10/3
    In mixed form: 31/3

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