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Add 5/21 and 28/20

1st number: 5/21, 2nd number: 1 8/20

5/21 + 28/20 is 172/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 20 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 21 × 20 = 420,
    5/21 = 5 × 20/21 × 20 = 100/420
  3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
    28/20 = 28 × 21/20 × 21 = 588/420
  4. Add the two like fractions:
    100/420 + 588/420 = 100 + 588/420 = 688/420
  5. 688/420 simplified gives 172/105
  6. So, 5/21 + 28/20 = 172/105
    In mixed form: 167/105

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