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Add 12/15 and 3/84

12/15 + 3/84 is 117/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 84 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 15 × 28 = 420,
    12/15 = 12 × 28/15 × 28 = 336/420
  3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
    3/84 = 3 × 5/84 × 5 = 15/420
  4. Add the two like fractions:
    336/420 + 15/420 = 336 + 15/420 = 351/420
  5. 351/420 simplified gives 117/140
  6. So, 12/15 + 3/84 = 117/140

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