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Add 3/21 and 9/16

3/21 + 9/16 is 79/112.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 16 is 336
  2. For the 1st fraction, since 21 × 16 = 336,
    3/21 = 3 × 16/21 × 16 = 48/336
  3. Likewise, for the 2nd fraction, since 16 × 21 = 336,
    9/16 = 9 × 21/16 × 21 = 189/336
  4. Add the two fractions:
    48/336 + 189/336 = 48 + 189/336 = 237/336
  5. 237/336 simplified gives 79/112
  6. So, 3/21 + 9/16 = 79/112

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