I have done some testing on the percentages given for crafting/gathering. These percentages provided by the game are far off from the the actual numbers.

Game percentage given: Range from 80-85%. Most data collected here was at 85%. The actual percentage was 77%.

Game percentage given: Range from 65-68%. Most data collected here was at 67%. The actual percentage was 57%.

These test runs were 100 attempts each. The given percentages need to be closer to the actual statistics.

I'm just saying this needs to be looked into.