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Add 8/21 and 45/7

1st number: 8/21, 2nd number: 6 3/7

8/21 + 45/7 is 143/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 7 is 21
  2. For the 1st fraction, since 21 × 1 = 21,
    8/21 = 8 × 1/21 × 1 = 8/21
  3. Likewise, for the 2nd fraction, since 7 × 3 = 21,
    45/7 = 45 × 3/7 × 3 = 135/21
  4. Add the two fractions:
    8/21 + 135/21 = 8 + 135/21 = 143/21
  5. So, 8/21 + 45/7 = 143/21
    In mixed form: 617/21

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