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Add 15/28 and 20/54

15/28 + 20/54 is 685/756.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 54 is 756
  2. For the 1st fraction, since 28 × 27 = 756,
    15/28 = 15 × 27/28 × 27 = 405/756
  3. Likewise, for the 2nd fraction, since 54 × 14 = 756,
    20/54 = 20 × 14/54 × 14 = 280/756
  4. Add the two fractions:
    405/756 + 280/756 = 405 + 280/756 = 685/756

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