On Rapidminer Client, navigate to Settings>Preferences>General>"Number Format" and change the number of digits there as can be seen below:
Inside a process, one would have to use a "Format Numbers" operator with a pattern of 0.00 (from 3 to 2 decimals) but it would turn the field into a nominal
Using a "Parse Numbers" operator afterwards would reset the formatting.
Thanks for the helpful reminder. In practice, if I want to continue to use the underlying attribute in numerical calculations, I typically just add a "Generate Copy" before the "Format Numbers" and keep two versions, one formatted (nominal) for reports and such and the other numerical for calculations. This avoids the problem of having to switch the type back and forth on the same attribute depending on what you are doing.