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Add 20/12 and 15/7

1st number: 1 8/12, 2nd number: 2 1/7

20/12 + 15/7 is 80/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 7 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 7 × 12 = 84,
    15/7 = 15 × 12/7 × 12 = 180/84
  4. Add the two like fractions:
    140/84 + 180/84 = 140 + 180/84 = 320/84
  5. 320/84 simplified gives 80/21
  6. So, 20/12 + 15/7 = 80/21
    In mixed form: 317/21

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