Regular Expression for float and percentage

Question

I need regex patterns for floating point numbers with optional % sign at the end like

12.32
12.32%
0.32
.32
.32%

arbitrary length of numbers on left and right of floating point numbers. I need this to validate input in asp.net mvc app
UPDATE:
forgot following combinations

12%
35
45%

Answer 1

This regex should do it for you...

\d*\.\d+%?

Which means... zero or more digits (\d*) followed by a period (escaped \.) followed by one or more digits (\d+) followed by an optional % (%?)

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Update: match whole numbers

\d*\.?\d+%?