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Add 15/35 and 42/63

15/35 + 42/63 is 23/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 35 and 63 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 35 × 9 = 315,
    15/35 = 15 × 9/35 × 9 = 135/315
  3. Likewise, for the 2nd fraction, since 63 × 5 = 315,
    42/63 = 42 × 5/63 × 5 = 210/315
  4. Add the two like fractions:
    135/315 + 210/315 = 135 + 210/315 = 345/315
  5. 345/315 simplified gives 23/21
  6. So, 15/35 + 42/63 = 23/21
    In mixed form: 12/21

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