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Add 20/28 and 10/15

20/28 + 10/15 is 29/21.

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,
    10/15 = 10 × 28/15 × 28 = 280/420
  4. Add the two like fractions:
    300/420 + 280/420 = 300 + 280/420 = 580/420
  5. 580/420 simplified gives 29/21
  6. So, 20/28 + 10/15 = 29/21
    In mixed form: 18/21

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