In extracurricular activities, (1/4) of the whole class go to play ball, and the rest go to skip rope.
课外活动，全班同学的(1/4)去打球，剩下的同学去跳绳，跳绳的比打球的多全班同学的几分之几？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4) - (1/4)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>