In this task, you will be given a list of numbers. The goal is to divide all the numbers in the list by a constant such that the sum of the resulting list is 1. The output should be rounded to 3 decimals.
Q: [144.075, 170.072, -96.578, -28.12]
A: 
[ 0.76   0.898 -0.51  -0.148]