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Add 9/4 and 15/21

1st number: 2 1/4, 2nd number: 15/21

9/4 + 15/21 is 83/28.

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,
    9/4 = 9 × 21/4 × 21 = 189/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    15/21 = 15 × 4/21 × 4 = 60/84
  4. Add the two like fractions:
    189/84 + 60/84 = 189 + 60/84 = 249/84
  5. 249/84 simplified gives 83/28
  6. So, 9/4 + 15/21 = 83/28
    In mixed form: 227/28

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