The school invested in the construction of the playground. The original plan was to invest 100,000 yuan, but the actual investment was only 85,000 yuan. How much was the actual investment saved compared to the original plan?
学校投资修建操场，原计划投资10万元，实际只用了8.5万元，实际投资比原计划节约了百分之几？
<gadget id="calculator">10 - 8.5</gadget>
<output>1.5</output>

<gadget id="calculator">1.5 / 10</gadget>
<output>0.15</output>

<result>0.15</result>