The farm tool factory plans to produce a batch of farm tools, 240 of which have been produced, and there are 660 left. What percentage of the plan has not been completed?
农具厂计划生产一批农具，已经生产了240件，还剩660件，还剩计划的几分之几没有完成？
<gadget id="calculator">240 + 660</gadget>
<output>900</output>

<gadget id="calculator">660 / 900</gadget>
<output>11/15 = around 0.733333</output>

<result>11/15 = around 0.733333</result>