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Add 27/28 and 12/15

27/28 + 12/15 is 247/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 15 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 28 × 15 = 420,
    27/28 = 27 × 15/28 × 15 = 405/420
  3. Likewise, for the 2nd fraction, since 15 × 28 = 420,
    12/15 = 12 × 28/15 × 28 = 336/420
  4. Add the two like fractions:
    405/420 + 336/420 = 405 + 336/420 = 741/420
  5. 741/420 simplified gives 247/140
  6. So, 27/28 + 12/15 = 247/140
    In mixed form: 1107/140

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