Answers

Add 4/84 and 21/5

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

4/84 + 21/5 is 446/105.

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,
   4/84 = 4 × 5/84 × 5 = 20/420
3. Likewise, for the 2nd fraction, since 5 × 84 = 420,
   21/5 = 21 × 84/5 × 84 = 1764/420
4. Add the two like fractions:
   20/420 + 1764/420 = 20 + 1764/420 = 1784/420
5. 1784/420 simplified gives 446/105
6. So, 4/84 + 21/5 = 446/105
   In mixed form: 426/105

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