Answers

Add 63/28 and 72/80

1^st number: 2 7/28, 2^nd number: 72/80

63/28 + 72/80 is 63/20.

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,
   63/28 = 63 × 20/28 × 20 = 1260/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   72/80 = 72 × 7/80 × 7 = 504/560
4. Add the two like fractions:
   1260/560 + 504/560 = 1260 + 504/560 = 1764/560
5. 1764/560 simplified gives 63/20
6. So, 63/28 + 72/80 = 63/20
   In mixed form: 33/20

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