Answers

Add 28/20 and 45/80

1^st number: 1 8/20, 2^nd number: 45/80

28/20 + 45/80 is 157/80.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 80 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 20 × 4 = 80,
   28/20 = 28 × 4/20 × 4 = 112/80
3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
   45/80 = 45 × 1/80 × 1 = 45/80
4. Add the two like fractions:
   112/80 + 45/80 = 112 + 45/80 = 157/80
5. So, 28/20 + 45/80 = 157/80
   In mixed form: 177/80

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