There are 240 students in the sixth grade in a certain school, and (3/8) of them were rated as "three good students" in the last semester, and boys accounted for (2/5) of the three good students, and girls accounted for a few of the total number of students in the sixth grade. How much? (the simplest method)
某校六年级有240人，上学期有(3/8)的人被评为"三好学生"，而三好生中男生占(2/5)，三好生中的女生占六年级总人数的几分之几？(最简方法)
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/8) * (3/5)</gadget>
<output>9/40 = around 0.225</output>

<result>9/40 = around 0.225</result>