The number of sixth graders is 20% more than that of fifth graders, and the number of fifth graders is 20% less than that of fourth graders. So what percentage of sixth graders account for fourth graders?
六年级人数比五年级人数多20%，五年级人数比四年级人数少20%，那么六年级占四年级人数的百分之多少？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">100 * (6/5)</gadget>
<output>120</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">100 / (4/5)</gadget>
<output>125</output>

<gadget id="calculator">120 / 125</gadget>
<output>24/25 = around 0.96</output>

<result>24/25 = around 0.96</result>