eBook Problem 4-02 You purchase 90 shares for $70 a share ($6,300), and after a year the price fails to $55. Calculate the percentage return on your investment if you bought the stock on margin and the margin requirement was (ignore commissions, dividends, and interest expense): a. 25 percent. Use a minus sign to enter the amount as a negative value. Round your answer to one decimal place. 21.4 %