Integration Services :: Converting A String Percent Value To Decimal

I am reading a data source where all data in a given column is held as a string containing a percent value with 2 decimal points:

03.52%
12.32%
92.10%
80.05%
27.92%
100.00%
[...]
etc...

I need to convert these into decimal values with up to four decimal points, like this:
0.352
0.1232
0.9210
0.8005
0.2792
1.0000

I am trying to use the derived column editor but since I am fairly new to this, I am getting my wires crossed. c

1. Remove the % sign from the string -- not sure if I should use TRIM, or REPLACE
2. Divide the value by 100 -- but don't I need to do some sort of type casting first?
3. Do a cast to convert whatever I got into the correct decimals -- perhaps this isn't required if I did step 2 as a typecast to decimals already?