A school used 15,000 yuan to build a sunny playground, saving 5,000 yuan compared to the plan. What percentage of the savings?
一个学校修建阳光操场用1.5万元，比计划节省0.5万元，节省百分之几？
<gadget id="calculator">0.5 + 1.5</gadget>
<output>2</output>

<gadget id="calculator">0.5 / 2</gadget>
<output>0.25</output>

<result>0.25</result>