Gavin thought he was making a good investment when he heard about an on-line grocery company. So he bought 500 shares in the company at $25 a share. The company ended up going bankrupt, and when Gavin sold his shares they were $3.30 a share.
 What was the percent decrease in the share price?
 A) 13.2% 
 B) 86.8% 
 C) 113% 
 D) 657% 
 PLZ HELP