The Xinhua Farm Tool Factory plans to produce a batch of farm tools. It has already produced 300 pieces, and there are 900 pieces left. What percentage of the annual plan is left to be completed?
新华农具厂计划生产一批农具，已经生产了300件，还剩900件，还剩全年计划的几分之几没有完成？
<gadget id="calculator">300 + 900</gadget>
<output>1_200</output>

<gadget id="calculator">900 / 1_200</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>