Meaning of “the 80/20 rule” in the English Dictionary

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"the 80/20 rule" in Business English

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the 80/20 rulenoun [ S ]

uk us also the 80/20 principle MANAGEMENT

a principle stating that 80 per cent of problems or effects come from 20 per cent of causes for a particular event:

Use the 80/20 rule to increase your website’s effectiveness by focusing on the 20% that will bring you 80% of the results.

(Definition of “the 80/20 rule” from the Cambridge Business English Dictionary © Cambridge University Press)