Instructions: 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: [-99.278, -12.538, -37.696, 215.234]
Output:
[-1.511 -0.191 -0.574  3.275]