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.
[-70.561, 205.866, -6.386, 155.208, -90.971, 12.354, 152.984, 18.451, 153.349, -97.692]