The school is building a runway, which is planned to be completed in 15 days, but has been completed in 3 days. What percentage of the project has been completed?
学校修一条跑道，计划15天完成，已经做了3天，完成了这个工程的几分之几？
<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/15) * 3</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>