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Add 7/21 and 9/4

1st number: 7/21, 2nd number: 2 1/4

7/21 + 9/4 is 31/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 4 is 84
  2. For the 1st fraction, since 21 × 4 = 84,
    7/21 = 7 × 4/21 × 4 = 28/84
  3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
    9/4 = 9 × 21/4 × 21 = 189/84
  4. Add the two fractions:
    28/84 + 189/84 = 28 + 189/84 = 217/84
  5. 217/84 simplified gives 31/12
  6. So, 7/21 + 9/4 = 31/12
    In mixed form: 27/12

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