Answer:
First, we determine the approximate number of tellers currently in the branch by dividing the total number of clients.
256, by the clients-per-teller ratio of 32 to 1.
This calculation is 256/32 = 8.
Therefore, there are currently 8 tellers working in the branch.
Next, we calculate the number of tellers that should be working to maintain the same number of clients.
256, but with a clients-per-teller ratio of 20 to 1.
256/20 = 12.8.
Since we cannot have a fraction of a teller, we round this number up to 13.
To determine how many additional tellers management should hire, we subtract the current number of tellers from the desired number.
13 - 8 = 5.
Therefore, management should hire 5 more tellers.