The Economic and Technological Development Zone originally had 2,000 technical talents, and 500 new technical talents were introduced this year. What is the percentage of the number of newly introduced technical personnel to the existing technical personnel this year?
经济技术开发区原有技术人才2000名，今年又新引进500名技术人才．今年新引进技术人才数占现有技术人才数的多少．
<gadget id="calculator">2_000 + 500</gadget>
<output>2_500</output>

<gadget id="calculator">500 / 2_500</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>