Hello.<br/>In the event: <br/> - the sales of 2007 is 100 units<br/> - the sales of 2008 1s 85 units <br/><br/>I think we may say that the sales dropped 15 percent from 2007 to 2008.<br/>Can we also say that the sales dropped 15 percent from a year ago?<br/><br/>Thank you in advance.