Regular Expressions

Hi All, I am trying to create a regular expression for my textBox entry. I want the user to be able to input from 0% to 100% including numbers with decimal points such as (2.5%,1.7%.... so forth). My regular expression looks like this: @"([1-9]|[1-9][0-9])%" which allows me to input from 1% to 99% only as whole numbers. Any ideas on how to modify the above expression? Many thanks in advance. ...