Among the students in Class 1 of the fifth grade, the number of boys accounts for (2/5), then the number of girls accounts for the number of the whole class.
五年级1班学生中，男生人数占(2/5)，则女生人数占全班人数的多少．
<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>

<result>3/5 = around 0.6</result>