Answers

Add 45/28 and 54/80

1^st number: 1 17/28, 2^nd number: 54/80

45/28 + 54/80 is 639/280.

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,
   54/80 = 54 × 7/80 × 7 = 378/560
4. Add the two like fractions:
   900/560 + 378/560 = 900 + 378/560 = 1278/560
5. 1278/560 simplified gives 639/280
6. So, 45/28 + 54/80 = 639/280
   In mixed form: 279/280

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