Answers

Add 80/36 and 45/20

1^st number: 2 8/36, 2^nd number: 2 5/20

80/36 + 45/20 is 161/36.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 36 and 20 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 36 × 5 = 180,
   80/36 = 80 × 5/36 × 5 = 400/180
3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
   45/20 = 45 × 9/20 × 9 = 405/180
4. Add the two like fractions:
   400/180 + 405/180 = 400 + 405/180 = 805/180
5. 805/180 simplified gives 161/36
6. So, 80/36 + 45/20 = 161/36
   In mixed form: 417/36

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