Class 5 (1) has 20 boys and 30 girls. What percentage of the class are boys?
五(一)班有男生20人，女生30人．男生人数占全班人数的几分之几？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

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