Primary and secondary schools in Xincheng carried out waste paper recycling activities, and a total of 87.5 tons of waste paper were recycled. These recycled waste paper can produce 70 tons of recycled paper. What is the recycling rate of these waste papers?
新城市中小学校开展回收废纸活，共回收废纸87.5吨．这些回收的废纸能生产70吨再生纸．这些废纸的再生率是百分之几？
<gadget id="calculator">70 / 87.5</gadget>
<output>0.8</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">0.8 * 1</gadget>
<output>0.8</output>

<result>0.8</result>