spent 30% of our entire life just working one-third or 30 percent of human life 30 percent of their lives at work estimates 30 percent life working of your life estimates a third spends about one-third of their life working 30% of their lives 30% of your life working 30% of their lifetime one-third adult life at work 30 percent of our lives of your life a third of our lives working 30 percent 1/3 of their lives working of your life