A user has created a document in excel (works in 2007 and above). This document contains some simple data in one sheet and a chart in the other.
The problem is the chart which displays fine in excel, loses the formatting when displayed in the web part. In this case the data is meant to be a percentage but appears to be displaying as a general number.
All the formatting in the document itself (for both the graph and the data) has been set to percentage but the problem persists.