Answers

Add 81/80 and 8/5

1^st number: 1 1/80, 2^nd number: 1 3/5

81/80 + 8/5 is 209/80.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 5 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 80 × 1 = 80,
   81/80 = 81 × 1/80 × 1 = 81/80
3. Likewise, for the 2nd fraction, since 5 × 16 = 80,
   8/5 = 8 × 16/5 × 16 = 128/80
4. Add the two like fractions:
   81/80 + 128/80 = 81 + 128/80 = 209/80
5. So, 81/80 + 8/5 = 209/80
   In mixed form: 249/80

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