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Add 21/84 and 9/5

1st number: 21/84, 2nd number: 1 4/5

21/84 + 9/5 is 41/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 5 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 84 × 5 = 420,
    21/84 = 21 × 5/84 × 5 = 105/420
  3. Likewise, for the 2nd fraction, since 5 × 84 = 420,
    9/5 = 9 × 84/5 × 84 = 756/420
  4. Add the two like fractions:
    105/420 + 756/420 = 105 + 756/420 = 861/420
  5. 861/420 simplified gives 41/20
  6. So, 21/84 + 9/5 = 41/20
    In mixed form: 21/20

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