Ключевые слова: 20 percent, 80 percent, activity, basis, business, cause, concentration, condition, determination, divide, earning, economic, effect, event, failure, focus, goals, idea, important, income, influence, items, law, list, money, natural, outcome, percentage, planning, possibility, potential, principle, prioritization, profit, proportion, result, revenue, setting, signification, situation, society, strategy, success, support, trivial many, vital, vital few, wealth,