There are 40 students in Class 51, 15 of them participated in the calligraphy and painting competition. How many people participated in the competition accounted for the whole class.
五1班有学生40人，其中15人参加了书画比赛，参加比赛的人数占全班人数的多少．
<gadget id="calculator">15 / 40</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>