Class 501 has 45 students, including 25 boys. What percentage of the class are boys?
501班有45人，其中男生有25人，男生占全班人数的几分之几？
<gadget id="calculator">25 / 45</gadget>
<output>5/9 = around 0.555556</output>

<result>5/9 = around 0.555556</result>