80-20

80 20 rule
80 20 rule states that for many events, roughly 80% of the events come from 20% of the causes.
                                    20% ACTIONS = 80% RESULTS
                                    80% ACTIONS = 20% RESULTS  

Examples

20% of products revenue is  80%

20% of our cloths wear 80% of time

80% of use above marked button and remaining buttons use only 20% 

80% of use above marked button and remaining buttons use only 20% in mobile phone

Only 20% people using flights for travelling and remaining 80% using other sources

80% of jobs in private sector and remaining 20% of  jobs in government sector

80% of wealth controlled by 20% of people

80% of product complaints from 20% of customers