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Add 81/21 and 70/8

1st number: 3 18/21, 2nd number: 8 6/8

81/21 + 70/8 is 353/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 8 is 168
  2. For the 1st fraction, since 21 × 8 = 168,
    81/21 = 81 × 8/21 × 8 = 648/168
  3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
    70/8 = 70 × 21/8 × 21 = 1470/168
  4. Add the two fractions:
    648/168 + 1470/168 = 648 + 1470/168 = 2118/168
  5. After reducing the fraction, the answer is 353/28
  6. In mixed form: 1217/28

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