in Celonis Process Mining 4.4 you should calculate it the following way:
If you would have used 141943.00/31248 (float divided by integer) then the result what have led to an integer and mulitplying it by 1.0 would also not have helped.
The correct set up for the Single KPI should look in CPM4.4 that way (please also use ,.4f as the correct annotation)
In the Intelligent Business Cloud and CPM4.5 you should calculate it the following way to get your result with decimals.
What is the difference to CPM4.4? The logic has changed and always an float is provide from the engine and not based on the datatypes you put in.
Hope that solves the issue on all products you are operating.