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Add 20/4 and 9/21

1st number: 5 0/4, 2nd number: 9/21

20/4 + 9/21 is 38/7.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 21 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 4 × 21 = 84,
    20/4 = 20 × 21/4 × 21 = 420/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    9/21 = 9 × 4/21 × 4 = 36/84
  4. Add the two like fractions:
    420/84 + 36/84 = 420 + 36/84 = 456/84
  5. 456/84 simplified gives 38/7
  6. So, 20/4 + 9/21 = 38/7
    In mixed form: 53/7

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