Answers

Add 81/7 and 60/80

1^st number: 11 4/7, 2^nd number: 60/80

81/7 + 60/80 is 345/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 80 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 7 × 80 = 560,
   81/7 = 81 × 80/7 × 80 = 6480/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   60/80 = 60 × 7/80 × 7 = 420/560
4. Add the two like fractions:
   6480/560 + 420/560 = 6480 + 420/560 = 6900/560
5. 6900/560 simplified gives 345/28
6. So, 81/7 + 60/80 = 345/28
   In mixed form: 129/28

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