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Add 12/15 and 3/8

12/15 + 3/8 is 47/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 8 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 15 × 8 = 120,
    12/15 = 12 × 8/15 × 8 = 96/120
  3. Likewise, for the 2nd fraction, since 8 × 15 = 120,
    3/8 = 3 × 15/8 × 15 = 45/120
  4. Add the two like fractions:
    96/120 + 45/120 = 96 + 45/120 = 141/120
  5. 141/120 simplified gives 47/40
  6. So, 12/15 + 3/8 = 47/40
    In mixed form: 17/40

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