Xiao Ming signed up for the 2000-meter long-distance race in the sports meeting. After he asked the physical education teacher to train him, his grades improved significantly, and the time he took to complete the race was shortened (1/6). How much is his speed increased than before.
小明报名参加运动会2000米长跑比赛．他请体育老师对他进行训练后成绩有了显著提高，跑完全程所用时间比原来缩短了(1/6)．则他的速度比原来提高了多少．
<gadget id="calculator">6 - 5</gadget>
<output>1</output>

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

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