A power plant originally planned to burn 160 tons of coal per day, but actually only burned 140 tons per day. How many percent can be saved every day?
一个发电厂原计划每天烧煤160吨，实际每天只烧了140吨，这样每天可节约百分之几？
<gadget id="calculator">160 - 140</gadget>
<output>20</output>

<gadget id="calculator">20 / 160</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>