A farm planned to sell 4,000 tons of cotton to the country, but actually sold 4,600 tons. What percentage of the plan was exceeded?
某农场计划向国家交售4000吨棉花，实际交售了4600吨，超额完成了计划的百分之几？
<gadget id="calculator">4_600 - 4_000</gadget>
<output>600</output>

<gadget id="calculator">600 / 4_000</gadget>
<output>3/20 = around 0.15</output>

<result>3/20 = around 0.15</result>