You purchase $170$ shares for $$30$ a share $($$$5,100),$ and after a year the price falls to $$25.$ 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$)$:

$20$ percent. Use a minus sign to enter the amount as a negative value. Round your answer to one decimal place.

$\%$

$40$ percent. Use a minus sign to enter the amount as a negative value. Round your answer to one decimal place.

$\%$

$75$ percent. Use a minus sign to enter the amount as a negative value. Round your answer to one decimal place.

$\%$