I have install Sakai version 12, I encountered the following problem: The input score for the question was 0.525 but after clicking the Save button the score became 0.53. I tried to reconfigure the sakai.properties file at line gradebook.class.average.decimal.places and assignment.grading.decimals but failed. I have attached the picture, expect anyone to help me. Thanks! Picture 1: http://prntscr.com/j36o75 Picture 2: http://prntscr.com/j36ogy Picture 3: http://prntscr.com/j36on1 Picture 4: http://prntscr.com/j36ork
From your pictures it looks like you're referring to Tests & Quizzes rather than assignment. It looks like T&Q (Samigo) is hardcoded to only be 2 decimal places. From what I can see Gradebook is also hardcoded for individual grade items to be 2 decimal places.
You'd have to submit a feature request on Sakai's Jira or a Pull Request to allow these values to be configured. There may be some loss in precision if too many decimal places are supported.