pw.sh

pw() {
	result=$(echo "scale=4 ; $1 / $2 * 100" | bc)
	printf "%s is %.2f%% of %s\n" "$1" "$result" "$2"
	if (( $(echo "$1 < $2" | bc -l) ))
	then
		diff=$(echo "scale=4 ; $2 - $1" | bc)
		diffPerc=$(echo "scale=4 ; $diff / $2 * 100" | bc)
		printf "%s is a %.2f%% decrease of %s\n" "$1" "$diffPerc" "$2"
	else
		diff=$(echo "scale=4 ; $1 - $2" | bc)
		diffPerc=$(echo "scale=4 ; $diff / $2 * 100" | bc)
		printf "%s is a %.2f%% increase of %s\n" "$1" "$diffPerc" "$2"
	fi
}