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Add 15/28 and 20/42

15/28 + 20/42 is 85/84.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 42 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 28 × 3 = 84,
    15/28 = 15 × 3/28 × 3 = 45/84
  3. Likewise, for the 2nd fraction, since 42 × 2 = 84,
    20/42 = 20 × 2/42 × 2 = 40/84
  4. Add the two like fractions:
    45/84 + 40/84 = 45 + 40/84 = 85/84
  5. So, 15/28 + 20/42 = 85/84
    In mixed form: 11/84

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