The book claims the Pareto rule is conventional wisdom but false: in reality the numbers look more like 50&#x2F;20. My source: Slide 12 (<a href="http:&#x2F;&#x2F;www.slideshare.net&#x2F;zanaida&#x2F;how-brands-grow-a-summary-of-byron-sharps-book" rel="nofollow">http:&#x2F;&#x2F;www.slideshare.net&#x2F;zanaida&#x2F;how-brands-grow-a-summary-...</a>)