canteen originally planned to use 850 kilograms of coal in the first quarter, but actually used 782 kilograms. How many percent was saved compared to the original plan?
一个食堂原计划第一季度用煤850千克，实际用了782千克，实际比原计划节约了百分之几？
<gadget id="calculator">850 - 782</gadget>
<output>68</output>

<gadget id="calculator">68 / 850</gadget>
<output>2/25 = around 0.08</output>

<result>2/25 = around 0.08</result>