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Add 12/15 and 12/63

12/15 + 12/63 is 104/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 63 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 15 × 21 = 315,
    12/15 = 12 × 21/15 × 21 = 252/315
  3. Likewise, for the 2nd fraction, since 63 × 5 = 315,
    12/63 = 12 × 5/63 × 5 = 60/315
  4. Add the two like fractions:
    252/315 + 60/315 = 252 + 60/315 = 312/315
  5. 312/315 simplified gives 104/105
  6. So, 12/15 + 12/63 = 104/105

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