What is the 80/20 rule and why does it work?

Question

What is the 80/20 rule and why does it work?

In: 2

Answer 1

‘The 80/20 rule’ is less a rule and more an observed trend. It states that when you divide things in an approximate half, you can often observe an 80% distribution of a related statistic on one half, and 20% on the other.

One example is Chinese land area, where approximately 80% of their inhabitants live in the eastern half of the country, and 20% in the west.