A savings and loan association estimates that the amount of money on deposit will be 1,000,000 times the percentage rate of interest. For instance, a 3% interest rate will generate $3,000,000 in deposits. Suppose the savings and loan association can loan all the money it takes in at 4% interest. What interest rate on deposits generates the greatest profit? The interest rate on deposits that generates the greatest profit is [3%. (Type a whole number.)