Answers

Add 28/4 and 45/80

1^st number: 7 0/4, 2^nd number: 45/80

28/4 + 45/80 is 121/16.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 80 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 4 × 20 = 80,
   28/4 = 28 × 20/4 × 20 = 560/80
3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
   45/80 = 45 × 1/80 × 1 = 45/80
4. Add the two like fractions:
   560/80 + 45/80 = 560 + 45/80 = 605/80
5. 605/80 simplified gives 121/16
6. So, 28/4 + 45/80 = 121/16
   In mixed form: 79/16

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