A chemical fertilizer factory planned to produce 400,000 tons of fertilizers for the whole year, and produced 230,000 tons in the first half of the year. What percentage of the annual plan was completed in the first half of the year?
某化肥厂全年计划生产化肥40万吨，上半年生产了23万吨，上半年完成了全年计划的百分之几？
<gadget id="calculator">23 / 40</gadget>
<output>23/40 = around 0.575</output>

<result>23/40 = around 0.575</result>