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Add 9/28 and 12/45

9/28 + 12/45 is 247/420.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 45 is 1260
  2. For the 1st fraction, since 28 × 45 = 1260,
    9/28 = 9 × 45/28 × 45 = 405/1260
  3. Likewise, for the 2nd fraction, since 45 × 28 = 1260,
    12/45 = 12 × 28/45 × 28 = 336/1260
  4. Add the two fractions:
    405/1260 + 336/1260 = 405 + 336/1260 = 741/1260
  5. After reducing the fraction, the answer is 247/420

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