Important or useful to a number that is less than what is frivolous or useless, which is a number that is greater than 20 per 80 ratio known as the 80/20 rule of re grow themselves.
What is important or useful to have a number that is less than what is not important. Or no benefits, which amounted to more than the ratio of 20 to 80, also known as the Pareto 80/20 rule itself.
What is important or useful will be จำนวนที่น้อยกว่า inessential. Whether or not useful, which is more in the ratio of 20 per 80 or called the rules 80 / 20 ของพา ERATO itself.