There is a batch of clothing in a shopping mall, 320 sets are sold, and 80 sets remain. What percentage of this batch of clothes sold?
某商场有一批服装，卖出了320套，还剩80套．这批服装卖出了百分之几？
<gadget id="calculator">320 + 80</gadget>
<output>400</output>

<gadget id="calculator">320 / 400</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>