This question illustrates what is known as discount interest. Imagine you are discussing a loan with a somewhat unscrupulous lender. You want to borrow $20,000 for one year. The interest rate is 16.4 percent. You and the lender agree that the interest on the loan will be .164 $20,000 = $3,280. So, the lender deducts this interest amount from the loan up front and gives you $16,720. In this case, we say that the discount is $3,280.

What is the effective interest rate? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)