Hey there @dos_gis​, You can do this a few different ways. You could use regex inside the stringreplacer transformer like mentioned here -

http://docs.safe.com/fme/html/FME_Desktop_Documentation/FME_Transformers/Transformers/stringreplacer.htm

or the stringinserter custom transformer

https://hub.safe.com/publishers/safe-lab/transformers/stringinserter

Here's a super helpful resource I use when working with regex - https://regex101.com/

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Thanks. I've been trying the stringreplacer with regex:

[0-9]{2}+$

Replacement Text: .\\2

It's not adding the decimal just replacing the text

Try this out -  

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Almost but my number string isn't always the same length. I'm looking to add a decimal in front of the last two numbers regardless of the string length.

This should work for you. --

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Thank you. This did the trick.

(\\d.{1})$

Replacement text: .\\1