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Add 15/21 and 9/16

15/21 + 9/16 is 143/112.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 336
  2. For the 1st fraction, since 21 × 16 = 336,
    15/21 = 15 × 16/21 × 16 = 240/336
  3. Likewise, for the 2nd fraction, since 16 × 21 = 336,
    9/16 = 9 × 21/16 × 21 = 189/336
  4. Add the two like fractions:
    240/336 + 189/336 = 240 + 189/336 = 429/336
  5. 429/336 simplified gives 143/112
  6. So, 15/21 + 9/16 = 143/112
    In mixed form: 131/112

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