Type a manuscript, A type (1/6) of this manuscript every hour, B type (1/5) of this manuscript every hour, after 2.5 hours of cooperation between the two, there is still ((()) of this manuscript )/(())) did not hit.
打一份稿件，甲每小时打这份稿件的(1/6)，乙每小时打这份稿件的(1/5)，两人合作2.5小时后，还剩这份稿件的((())/(()))没打．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/6) + (1/5)</gadget>
<output>11/30 = around 0.366667</output>

<gadget id="calculator">(11/30) * 2.5</gadget>
<output>0.916667</output>

<gadget id="calculator">1 - 0.916667</gadget>
<output>0.083333</output>

<result>0.083333</result>