You purchased 100 shares of a company for $83.33, and borrowed $5,000 of the original purchase from your broker on margin. Since then, the stock price has fallen by 20.0%. If your broker charges a 4.7% interest rate on margin accounts, what is your overall return? (Type your answer as a percentage, i.e. if the answer is -12.5%, type -12.5, not -0.125)