Fast Formula and Applications Utilities Lookups

I have a table in App Utils lookups (FTE_HOURS_PER_WEEK). The Code is a numeric value relating to the employee FTE.  The Meaning is the number of hours worked in a week for that particular FTE.  eg code = 10 and meaning = 4.25 or code = 100 and meaning = 37.5

I want to write a fast formula which will take the employee FTE, look it up in the App Utils lookup table, and return the corresponding number of hours per week.  So if an employee is 100% FTE, I will receive a value of 37.5, or if the employee is on 10% FTE, I will recieve a value of 4.25.