Answers

Add 21/10 and 45/16

1^st number: 2 1/10, 2^nd number: 2 13/16

21/10 + 45/16 is 393/80.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 16 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 10 × 8 = 80,
   21/10 = 21 × 8/10 × 8 = 168/80
3. Likewise, for the 2nd fraction, since 16 × 5 = 80,
   45/16 = 45 × 5/16 × 5 = 225/80
4. Add the two like fractions:
   168/80 + 225/80 = 168 + 225/80 = 393/80
5. So, 21/10 + 45/16 = 393/80
   In mixed form: 473/80

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