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Add 16/8 and 15/21

1st number: 2 0/8, 2nd number: 15/21

16/8 + 15/21 is 19/7.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 21 is 168

    Next, find the equivalent fraction of both fractional numbers with denominator 168
  2. For the 1st fraction, since 8 × 21 = 168,
    16/8 = 16 × 21/8 × 21 = 336/168
  3. Likewise, for the 2nd fraction, since 21 × 8 = 168,
    15/21 = 15 × 8/21 × 8 = 120/168
  4. Add the two like fractions:
    336/168 + 120/168 = 336 + 120/168 = 456/168
  5. 456/168 simplified gives 19/7
  6. So, 16/8 + 15/21 = 19/7
    In mixed form: 25/7

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