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Add 16/4 and 9/21

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

16/4 + 9/21 is 31/7.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 21 is 84
  2. For the 1st fraction, since 4 × 21 = 84,
    16/4 = 16 × 21/4 × 21 = 336/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    9/21 = 9 × 4/21 × 4 = 36/84
  4. Add the two fractions:
    336/84 + 36/84 = 336 + 36/84 = 372/84
  5. After reducing the fraction, the answer is 31/7
  6. In mixed form: 43/7

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