# XX=5;top -n $XX | grep CPU | grep id | awk '{print $8}' | awk '{s+=$1} END {print s}' | xargs -I % echo "scale=0;%/$XX" | bc -l
# XX=5;top -n $XX | grep CPU | grep id | awk '{print $8}' | awk '{s+=$1} END {print s}' | xargs -I % echo "scale=0;%/$XX" | bc -l