The problem stems from how unemployment is measured: The adult unemployment rate is calculated by dividing the number of unemployed individuals by all individuals in the labor force. So if the labor force comprises 200 workers, and 20 are unemployed, the unemployment rate is 10%.
问题出在如何衡量失业：成年人失业率的算法是用没工作的个人数量除以劳动力总数。因此，如果劳动力总数为200，其中20人没有工作，那么失业率是10%。