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Add 20/28 and 7/15

20/28 + 7/15 is 124/105.

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,
    20/28 = 20 × 15/28 × 15 = 300/420
  3. Likewise, for the 2nd fraction, since 15 × 28 = 420,
    7/15 = 7 × 28/15 × 28 = 196/420
  4. Add the two like fractions:
    300/420 + 196/420 = 300 + 196/420 = 496/420
  5. 496/420 simplified gives 124/105
  6. So, 20/28 + 7/15 = 124/105
    In mixed form: 119/105

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