A primary school planned to donate 3,500 yuan to the Hope Project, but the actual donation was 4,200 yuan. What percentage exceeded the plan?
某小学计划为希望工程捐款3500元，实际捐款4200元，超过计划百分之几？
<gadget id="calculator">4_200 - 3_500</gadget>
<output>700</output>

<gadget id="calculator">700 / 3_500</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>