#!/usr/bin/env bash
set -euo pipefail
IFS=$'\n\t'

proc_output=""

proc_output=$(grep 'cpu ' /proc/stat | awk '{usage=($2+$4)*100/($2+$4+$5)} END {printf("%5.1f", usage)}')
proc_output=${proc_output#" "}

echo "$proc_output%"
exit 0