Answers

Add 45/28 and 72/80

1^st number: 1 17/28, 2^nd number: 72/80

45/28 + 72/80 is 351/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 80 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 28 × 20 = 560,
   45/28 = 45 × 20/28 × 20 = 900/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   72/80 = 72 × 7/80 × 7 = 504/560
4. Add the two like fractions:
   900/560 + 504/560 = 900 + 504/560 = 1404/560
5. 1404/560 simplified gives 351/140
6. So, 45/28 + 72/80 = 351/140
   In mixed form: 271/140

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