Type a manuscript, 35% of it has been typed, how much is left.
打一份稿件，已经打了35%，还剩多少．
<gadget id="calculator">35 / 100</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">1 - (7/20)</gadget>
<output>13/20 = around 0.65</output>

<result>13/20 = around 0.65</result>