You can do it using the menu Tools-Customize. There you can either reset
the Formatting Toolbar (on the Toolbars tab), or drag the % format to the bar
(from the Commands tab)

Hope this helps,
Miguel.

"Linds" wrote:

I know I used to have an icon on my toolbar where I could change the
percentage of my spreadsheet. How can I add that back to my toolbar? Thanks.