There are 50 students in the May 1st class, including 22 girls. What percentage of the whole class are boys?
五一班有学生50人，其中女生有22人，男生占全班人数的几分之几？
<gadget id="calculator">50 - 22</gadget>
<output>28</output>

<gadget id="calculator">28 / 50</gadget>
<output>14/25 = around 0.56</output>

<result>14/25 = around 0.56</result>