There are 30 students in the first class of the fifth grade, and 6 three good students are selected. What percentage of the whole class are the three good students?
五年级一班有30名学生，评出6名三好学生，三好学生的人数占全班人数的几分之几？
<gadget id="calculator">6 / 30</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>