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Add 2/28 and 20/21

2/28 + 20/21 is 43/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 21 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 28 × 3 = 84,
    2/28 = 2 × 3/28 × 3 = 6/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    20/21 = 20 × 4/21 × 4 = 80/84
  4. Add the two like fractions:
    6/84 + 80/84 = 6 + 80/84 = 86/84
  5. 86/84 simplified gives 43/42
  6. So, 2/28 + 20/21 = 43/42
    In mixed form: 11/42

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