..9 + .9 + .5 + .5 + .2 + .2 = 3.2
I'd multiply by 10.
Note 3.2 * 10 =32
So for every 32 cases
Nancy gets 9
Sara gets 9
Candy gets 5
Amy gets 5
Andrea gets 2
Betsy gets 2
If there are 32 cases every 32 days then you are done.
If there are 64 cases every 32 days then multiply the numbers above by 2.
If there are 16 cases every 32 then multiply the numbers above by 1/2
That is your question is not complete as you did not state how many cases there were every 32 days.
For example if there are no cases, then all six workers will get 0 cases.