Class Six 1 has 25% more people than Class Six 2, and Class Six 2 has fewer people than Class Six 1.
六1班人数比六2班多25%，六2班人数比六1班人数少多少．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(1/4) / (5/4)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>