It is hoped that students from the fourth to sixth grades of elementary school will participate in the tree planting activity. The original plan is to plant 320 trees, but the actual number of trees planted is 400. How many percent more trees are actually planted than planned?
希望小学四年级到六年级的同学参加植树活动，原计划植树320棵，实际植树400棵，实际比计划多植树百分之几？
<gadget id="calculator">400 - 320</gadget>
<output>80</output>

<gadget id="calculator">80 / 320</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>