You purchase $100$ shares of BAC Stock at $$30\mathrm{.}00$ per share using your margin account. The initial equity margin requirement is $60\%$ and you utilize all the debt allowed for the transaction. Your position carries a maintenance $($or minimum$)$ equity margin position of $40\%.$ After several days of the purchase, you notice the price of BAC Stock is now $$28\mathrm{.}00$ per share. Assume you close your position and your interest cost is $$0\mathrm{.}00.$ What is the return on your investment?