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Add 80/8 and 5/21

1st number: 10 0/8, 2nd number: 5/21

80/8 + 5/21 is 215/21.

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,
    80/8 = 80 × 21/8 × 21 = 1680/168
  3. Likewise, for the 2nd fraction, since 21 × 8 = 168,
    5/21 = 5 × 8/21 × 8 = 40/168
  4. Add the two like fractions:
    1680/168 + 40/168 = 1680 + 40/168 = 1720/168
  5. 1720/168 simplified gives 215/21
  6. So, 80/8 + 5/21 = 215/21
    In mixed form: 105/21

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