The number of people in class A is 10% more than that of class B, and the number of people in class B is less than that of class A
甲班人数比乙班多10%，乙班人数比甲班少多少
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">(1/10) / (11/10)</gadget>
<output>1/11 = around 0.090909</output>

<result>1/11 = around 0.090909</result>