Answers

Add 18/5 and 45/16

1^st number: 3 3/5, 2^nd number: 2 13/16

18/5 + 45/16 is 513/80.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 16 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 5 × 16 = 80,
   18/5 = 18 × 16/5 × 16 = 288/80
3. Likewise, for the 2nd fraction, since 16 × 5 = 80,
   45/16 = 45 × 5/16 × 5 = 225/80
4. Add the two like fractions:
   288/80 + 225/80 = 288 + 225/80 = 513/80
5. So, 18/5 + 45/16 = 513/80
   In mixed form: 633/80

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