What does 10/12 equal to?

10/12 can be simplified down to 5/6 after dividing the top and bottom by 2. 5/6 is equal to 0.83333.

Okay so there are 8 employees and 200 calls per hour for all in 8 hours then all you need to do is multiply the 200 calls per hour by the 8 employees
200 divided by 8 is 25 and 25  times 8 is 200 so each employee makes 200 calls in their work day 
i really hope i helped you out in some type of way :)))