Hi - Are you simply trying to convert the type ? As in make a string value be treated like a float? Or do you need an actual conversion (take one number, like ‘25’ and then covert it to something like 0.25?
Here is an example where we used templating to test the CPU capacity How Can I Use License Custom Fields Value in a Pre-Flight Check? While this article uses License Field Values, it shows how to use templating which would be needed to use the ParseFloat function?