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Add 3/4 and 9/21

3/4 + 9/21 is 33/28.

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,
    3/4 = 3 × 21/4 × 21 = 63/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    9/21 = 9 × 4/21 × 4 = 36/84
  4. Add the two fractions:
    63/84 + 36/84 = 63 + 36/84 = 99/84
  5. 99/84 simplified gives 33/28
  6. So, 3/4 + 9/21 = 33/28
    In mixed form: 15/28

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