列中的值以％表示

In Access I'd take the column I'm looking to get the data from select it. Go to its properties, go to Top Values, and I'd put in the percentage I wanted of the current list. For instance a Cost list. 1000 members, I only want to know the top 2% of cost of my members. I place 2% in and the list shows the top 2% of cost of my members.In Access I'd take the column I'm looking to ge