Answers

Add 80/27 and 45/20

1^st number: 2 26/27, 2^nd number: 2 5/20

80/27 + 45/20 is 563/108.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 27 and 20 is 540
   
   Next, find the equivalent fraction of both fractional numbers with denominator 540
2. For the 1st fraction, since 27 × 20 = 540,
   80/27 = 80 × 20/27 × 20 = 1600/540
3. Likewise, for the 2nd fraction, since 20 × 27 = 540,
   45/20 = 45 × 27/20 × 27 = 1215/540
4. Add the two like fractions:
   1600/540 + 1215/540 = 1600 + 1215/540 = 2815/540
5. 2815/540 simplified gives 563/108
6. So, 80/27 + 45/20 = 563/108
   In mixed form: 523/108

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