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Add 30/10 and 81/21

1st number: 3 0/10, 2nd number: 3 18/21

30/10 + 81/21 is 48/7.

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,
    30/10 = 30 × 21/10 × 21 = 630/210
  3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
    81/21 = 81 × 10/21 × 10 = 810/210
  4. Add the two like fractions:
    630/210 + 810/210 = 630 + 810/210 = 1440/210
  5. 1440/210 simplified gives 48/7
  6. So, 30/10 + 81/21 = 48/7
    In mixed form: 66/7

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