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Add 21/5 and 84/18

1st number: 4 1/5, 2nd number: 4 12/18

21/5 + 84/18 is 133/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 18 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 5 × 18 = 90,
    21/5 = 21 × 18/5 × 18 = 378/90
  3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
    84/18 = 84 × 5/18 × 5 = 420/90
  4. Add the two like fractions:
    378/90 + 420/90 = 378 + 420/90 = 798/90
  5. 798/90 simplified gives 133/15
  6. So, 21/5 + 84/18 = 133/15
    In mixed form: 813/15

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