There were 14 bottles of Arowana oil in the school cafeteria, but 5 bottles were used. What percentage of the original amount was left?
学校食堂原有14瓶金龙鱼油，用了5瓶，剩下的占原来的几分之几？
<gadget id="calculator">14 - 5</gadget>
<output>9</output>

<gadget id="calculator">9 / 14</gadget>
<output>9/14 = around 0.642857</output>

<result>9/14 = around 0.642857</result>