How to validate a percentage to two decimal places with a Regex?

Question

Is there a regex that would validate a percentage value to 2 decimal places?

I have a regex for two decimal places, but don't know how to stop values above 100. e.g. 100.01 is validated with my regex.

Answer 1

In Perl:

/(^100([.]0{1,2})?)$|(^\d{1,2}([.]\d{1,2})?)$/

or you can just add an extra if comparing 100 exactly :)