You purchase 160 shares for $50 a share ($8,000), and after a year the price falls to $45. 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):

1. 15 percent. Use a minus sign to enter the amount as a negative value. Round your answer to one decimal place.

   %

2. 30 percent. Use a minus sign to enter the amount as a negative value. Round your answer to one decimal place.

   %

3. 80 percent. Use a minus sign to enter the amount as a negative value. Round your answer to one decimal place.

   %