There are 48 people in the fifth grade who participated in the popular science knowledge competition, and 30 of them won the prize. What percentage of the participants did not win?
五年级有48人参加科普知识竞赛，其中有30人获奖．没有获奖的占参赛人数的百分之几？
<gadget id="calculator">48 - 30</gadget>
<output>18</output>

<gadget id="calculator">18 / 48</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>