The road construction team planned to build 4,800 meters of road in September, and completed 1,800 meters in the first half of the year. In the middle half of the year, 3/8 of the plan should be completed. What fraction of the plan can be completed in the second half of the year?
修路队九月份计划修路4800米，上旬已完成1800米，中旬要完成计划的(3/8)，下旬完成计划的几分之几才能完成任务？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8) - (3/8)</gadget>
<output>1/4 = around 0.25</output>

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