Sixth grade students in a certain school held a chess game. 40% of the students won the prizes, and 2/3 of the prize winners were boys. What percentage of the total number of girls won the prizes?
某校六年级学生举行棋类比赛，获奖的人数占总人数的40%，获奖的(2/3)是男生，获奖的女生占总人数的几分之几？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(2/5) * (1/3)</gadget>
<output>2/15 = around 0.133333</output>

<result>2/15 = around 0.133333</result>