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Add 15/12 and 20/70

1st number: 1 3/12, 2nd number: 20/70

15/12 + 20/70 is 43/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 70 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 12 × 35 = 420,
    15/12 = 15 × 35/12 × 35 = 525/420
  3. Likewise, for the 2nd fraction, since 70 × 6 = 420,
    20/70 = 20 × 6/70 × 6 = 120/420
  4. Add the two like fractions:
    525/420 + 120/420 = 525 + 120/420 = 645/420
  5. 645/420 simplified gives 43/28
  6. So, 15/12 + 20/70 = 43/28
    In mixed form: 115/28

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