How to add add percentage and increase each value to 3 decimals in excel

can anyone help me i have data in excel where iam doing sum of 3 columns and divided by 100 and writing the value in D column
here my requirement is i want add percentage and increase the value to 3 decimals to the column D
is this possible?
i dont have any pre-build template here

How about just doing this calculation in your automation before writing to Excel?