There are 22 girls in class six, accounting for 55% of the class. How many boys are there in class six?
六年一班女生有22人，占全班人数的55%，六年一班男生有多少人？
<gadget id="calculator">55 / 100</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">22 / (11/20)</gadget>
<output>40</output>

<gadget id="calculator">40 - 22</gadget>
<output>18</output>

<result>18</result>