A certain school held a composition competition, and there were several first, second, and third prizes in high school. First and second prizes accounted for (3/8) of the number of winners, second and third prizes accounted for (7/8), what percentage of the number of winners won the second prize?
某校举行作文比赛，高有一、二、三等奖若干名．获一、二等奖的占获奖人数的(3/8)，获二、三等奖的占获奖人数的(7/8)，获二等奖的点获奖人数的几分之几？
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

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

<gadget id="calculator">1 - (3/8)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">(7/8) - (5/8)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>