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Add 12/16 and 4/21

12/16 + 4/21 is 79/84.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 16 and 21 is 336

    Next, find the equivalent fraction of both fractional numbers with denominator 336
  2. For the 1st fraction, since 16 × 21 = 336,
    12/16 = 12 × 21/16 × 21 = 252/336
  3. Likewise, for the 2nd fraction, since 21 × 16 = 336,
    4/21 = 4 × 16/21 × 16 = 64/336
  4. Add the two like fractions:
    252/336 + 64/336 = 252 + 64/336 = 316/336
  5. 316/336 simplified gives 79/84
  6. So, 12/16 + 4/21 = 79/84

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