The forest farm plans to plant 750 saplings, and 550 were planted on the first day. What percentage of all the saplings are left unplanted?
林场计划种植树苗750棵，第一天种了550棵，还剩下全部树苗的几分之几没有种？
<gadget id="calculator">750 - 550</gadget>
<output>200</output>

<gadget id="calculator">200 / 750</gadget>
<output>4/15 = around 0.266667</output>

<result>4/15 = around 0.266667</result>