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Add 81/10 and 30/21

1st number: 8 1/10, 2nd number: 1 9/21

81/10 + 30/21 is 667/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 21 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 10 × 21 = 210,
    81/10 = 81 × 21/10 × 21 = 1701/210
  3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
    30/21 = 30 × 10/21 × 10 = 300/210
  4. Add the two like fractions:
    1701/210 + 300/210 = 1701 + 300/210 = 2001/210
  5. 2001/210 simplified gives 667/70
  6. So, 81/10 + 30/21 = 667/70
    In mixed form: 937/70

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