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Add 12/15 and 4/90

12/15 + 4/90 is 38/45.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 90 is 90
  2. For the 1st fraction, since 15 × 6 = 90,
    12/15 = 12 × 6/15 × 6 = 72/90
  3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
    4/90 = 4 × 1/90 × 1 = 4/90
  4. Add the two fractions:
    72/90 + 4/90 = 72 + 4/90 = 76/90
  5. After reducing the fraction, the answer is 38/45

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