The third grade students who participated in the mathematics competition won the first prize (1/15) of the total number, the second prize accounted for (4/15), the third prize accounted for (7/15), and the rest were excellent prizes and won the first prize What percentage of the total number of prizes and second prizes? What percentage of the total number of people who won the third prize accounted for more than those who won the second prize?
三年级学生参加数学竞赛获得一等奖的占总人数的(1/15)，二等奖占(4/15)，三等奖占(7/15)，其余的是优秀奖，获得一等奖和二等奖的一共占总人数的几分之几？获得三等奖的比获得二等奖的多占总人数的几分之几？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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