Answer:
The percentage loss will be "-9.08%". The further explanation is given below.
Explanation:
The given values are:
Invested amount
= 20,000
Price of purchase
= $66
Total number of shares
= 500
The borrowed amount will be:
= 
= 
When the price increase to 69.63, the gain will be:
= 
=
($)
The total gain will be:
= 
= 
Increase in percentage will be:
= 
=
%
Whereas if price stays quite well at $66, there is really no increase, so the percentage growth would be 0%.
If the price declines toward a loss of 62,37 per share:
= 
= 
Now,
The total loss will be:
= 
= 
The percentage loss will be:
= 
=
(%)