Problem $4-02$

You purchase $70$ shares for $$60$ a share $($$$4,200),$ and after a year the price falls to $$50.$ 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.

$\%$

b$.60$ percent. Use a minus sign to enter the amount as a negative value. Round your answer to one decimal place.

$\%$

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

$\%$