If you set an unbound control's Format property to Percent, Access enters values in the hundreds. For instance, if you enter 3, meaning 3%, Access displays 300%. If you enter 3% or .03, Access displays 3%. Don't expect users to know or accommodate this behavior, and training users to enter 3% or .03 is a burden for both of you.
In version 2003 and earlier, you can use the control's After Update event to control percent values as follows:
Me.percentfield.Value = Me.percentfield.Value / 100
This simple procedure reduces data input because users enter only the literal percent value. Don't try this with a control that's bound to a Number field where the Format property's set to Percent.
The good news is that 2007 eliminates this problem. The value you enter is the value you see.
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Susan Sales Harkins is an IT consultant, specializing in desktop solutions. Previously, she was editor in chief for The Cobb Group, the world's largest publisher of technical journals.