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Add 3/9 and 21/49

3/9 + 21/49 is 16/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 49 is 441

    Next, find the equivalent fraction of both fractional numbers with denominator 441
  2. For the 1st fraction, since 9 × 49 = 441,
    3/9 = 3 × 49/9 × 49 = 147/441
  3. Likewise, for the 2nd fraction, since 49 × 9 = 441,
    21/49 = 21 × 9/49 × 9 = 189/441
  4. Add the two like fractions:
    147/441 + 189/441 = 147 + 189/441 = 336/441
  5. 336/441 simplified gives 16/21
  6. So, 3/9 + 21/49 = 16/21

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