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: [-99.417, 128.599, 35.432, 101.629, 221.228]

[-0.257  0.332  0.091  0.262  0.571]