It’s took kelly 7 2/3 hours to flies from city A to city B then it took her another 5 3/4 hours to fly from city B to city c.

Question

Adding and subtracting mixed numbers. I need help I don’t know what to do. 

Answer 1

7 2/3 + 5 3/4

 

= 7 + 5 + 2/3 + 3/4

 

= 12 + 2/3 + 3/4

 

Lowest Common denominator for 2/3 and 3/4 is 12.

Multiply 2/3 by 4/4 and multiply 3/4 by 3/3

 

12 + 8/12 + 9/12

 

= 12 + 17/12

 

= 12 + 1 5/12

 

= 13 5/12 hours