Suppose that, at age 30, you might wish to leave your job and pursue a masters degree. If you choose to remain at your job, your employer would pay you $75k per year until retirement, at age 55. If you go back to the university, you would have to sacrifice 2 years of income, but once you graduate, you would receive $113k per year until you retire at age 65. The masters program you are interested in costs $22 per year.

Note: The term k is used to represent thousands ( $1,000).

Required: At an opportunity cost of 9%, determine the percentage difference between your most and least profitable alternatives, with the least profitable option as the basis for your calculation.