Answers

Add 9/20 and 84/5

1^st number: 9/20, 2^nd number: 16 4/5

9/20 + 84/5 is 69/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 5 is 20
   
   Next, find the equivalent fraction of both fractional numbers with denominator 20
2. For the 1st fraction, since 20 × 1 = 20,
   9/20 = 9 × 1/20 × 1 = 9/20
3. Likewise, for the 2nd fraction, since 5 × 4 = 20,
   84/5 = 84 × 4/5 × 4 = 336/20
4. Add the two like fractions:
   9/20 + 336/20 = 9 + 336/20 = 345/20
5. 345/20 simplified gives 69/4
6. So, 9/20 + 84/5 = 69/4
   In mixed form: 171/4

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