Definition: 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.
Input: [128.657, 211.585, 58.509, 141.168, -42.325]

[ 0.259  0.425  0.118  0.284 -0.085]