certain county planned to plant 120 hectares of trees last year, but actually planted 150 hectares of trees. What percentage was exceeded?
某县去年计划植树面积为120公顷，实际植树150公顷，超额了百分之几？
<gadget id="calculator">150 - 120</gadget>
<output>30</output>

<gadget id="calculator">30 / 120</gadget>
<output>1/4 = around 0.25</output>

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