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Add 28/10 and 1/21

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

28/10 + 1/21 is 299/105.

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,
    28/10 = 28 × 21/10 × 21 = 588/210
  3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
    1/21 = 1 × 10/21 × 10 = 10/210
  4. Add the two like fractions:
    588/210 + 10/210 = 588 + 10/210 = 598/210
  5. 598/210 simplified gives 299/105
  6. So, 28/10 + 1/21 = 299/105
    In mixed form: 289/105

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