Vilfredo Pareto was an Italian economist back in the early 1900. He discovered that 20 % of the population owned 80 % of the wealth. (I think it was in Italy). People have later on applied this 80/20 principle to other stuff. Like 20 % of the carpet will get 80 % of the walking. … Continue reading “The 80/20 Principle to Spend Less Than 50 % of Our Salary”