In the 29th Beijing Olympic Games, Jamaican athlete Bolt won the men's 100-meter championship with a time of 9.69 seconds. The men's 100-meter championship in the first Athens Olympic Games was 12 seconds. By what percentage has the performance of the men's 100-meter champion improved?
第29届北京奥运会牙买加运动员博尔特以9.69秒的成绩获得男子百米冠军，第一届雅典奥运会男子百米冠军的成绩是12秒，第29届奥运会男子百米冠军的成绩比第一届男子百米冠军的成绩提高了百分之几？
<gadget id="calculator">12 - 9.69</gadget>
<output>2.31</output>

<gadget id="calculator">2.31 / 12</gadget>
<output>0.1925</output>

<result>0.1925</result>