82% of a project has been completed, and how much is left unfinished.
一项工程已经完成了82%，还剩下多少没有完成．
<gadget id="calculator">82 / 100</gadget>
<output>41/50 = around 0.82</output>

<gadget id="calculator">1 - (41/50)</gadget>
<output>9/50 = around 0.18</output>

<result>9/50 = around 0.18</result>