A car factory produced 15,000 cars in the first half of the year, 3,000 more than the original plan, by what percentage?
某汽车制造厂上半年生产小汽车15000辆，比原计划多生产3000辆，超产百分之几？
<gadget id="calculator">15_000 - 3_000</gadget>
<output>12_000</output>

<gadget id="calculator">3_000 / 12_000</gadget>
<output>1/4 = around 0.25</output>

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