Answers

Add 21/8 and 45/80

1^st number: 2 5/8, 2^nd number: 45/80

21/8 + 45/80 is 51/16.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 8 and 80 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 8 × 10 = 80,
   21/8 = 21 × 10/8 × 10 = 210/80
3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
   45/80 = 45 × 1/80 × 1 = 45/80
4. Add the two like fractions:
   210/80 + 45/80 = 210 + 45/80 = 255/80
5. 255/80 simplified gives 51/16
6. So, 21/8 + 45/80 = 51/16
   In mixed form: 33/16

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