Why is SSRS pie chart rounding my values to .00

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SQL

SSRS

SSRS-2008

Hi
I have a Data set that returns percentages.
The percentages show as 2.3256 in ssms

When I add the field onto the pie chart it shows as 2.00

I want to show the full amount on 2.2356.

I am not sure what I am doing wrong

What I have tried:

I tried changing the series properties > Numbers, but I am still getting numbers with .0000

In my Dataset I use a count(column) * cast(varchar to decimal(18,4)) / 100 to get the value

Is there perhaps somewhere else I can check