Answers

Add 72/28 and 80/45

1^st number: 2 16/28, 2^nd number: 1 35/45

72/28 + 80/45 is 274/63.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 45 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 28 × 45 = 1260,
   72/28 = 72 × 45/28 × 45 = 3240/1260
3. Likewise, for the 2nd fraction, since 45 × 28 = 1260,
   80/45 = 80 × 28/45 × 28 = 2240/1260
4. Add the two like fractions:
   3240/1260 + 2240/1260 = 3240 + 2240/1260 = 5480/1260
5. 5480/1260 simplified gives 274/63
6. So, 72/28 + 80/45 = 274/63
   In mixed form: 422/63

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