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Add 21/10 and 84/42

1st number: 2 1/10, 2nd number: 2 0/42

21/10 + 84/42 is 41/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 42 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 10 × 21 = 210,
    21/10 = 21 × 21/10 × 21 = 441/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    84/42 = 84 × 5/42 × 5 = 420/210
  4. Add the two like fractions:
    441/210 + 420/210 = 441 + 420/210 = 861/210
  5. 861/210 simplified gives 41/10
  6. So, 21/10 + 84/42 = 41/10
    In mixed form: 41/10

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