This will be a LINKS-PAGE, with **summaries** (of the main ideas) plus **links** to pages where you can learn more.

**The Pareto Principle** – Descriptions, Explanations, Applications

*http:// betterexplained.com/articles/understanding-the-pareto-principle-the-8020-rule/*

link from Higher Chronicle - *http://www.bsu.edu/libraries/ahafner/awh-th-math-pareto.html*

Chronicle - *http://chronicle.com/blogs/profhacker/the- 80-20-principle/31626*

*http://en. wikipedia.org/wiki/80-20_rule*

**I.O.U.** — There will be more links here later.

**MATHEMATICS**

The 80/20 is estimated not calculated, and it's approximate not exact. Therefore, don't interpret the 80/20 literally.

The 80/20 simply means that "usually, not all things are equal in value." Sometimes instead of 80/20 an estimated split should be 90/10, or 70/30, or (when values are equal, or at least similar enough) 50/50.

Sometimes "80 + 20 = 100" when you split a whole (= 100%) into categories. But... the "best 20%" may not produce 80% of results; instead it might be 25%, 40%, or 90%.