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Add 15/24 and 21/90

15/24 + 21/90 is 103/120.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 24 and 90 is 360
  2. For the 1st fraction, since 24 × 15 = 360,
    15/24 = 15 × 15/24 × 15 = 225/360
  3. Likewise, for the 2nd fraction, since 90 × 4 = 360,
    21/90 = 21 × 4/90 × 4 = 84/360
  4. Add the two fractions:
    225/360 + 84/360 = 225 + 84/360 = 309/360
  5. After reducing the fraction, the answer is 103/120

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