A certain village planted 2,400 trees last year, which was 20% less than the previous year. How many percent more than the previous year?
某村去年植树2400棵，比前年少20%，前年比去年多百分之几？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">2_400 / (4/5)</gadget>
<output>3_000</output>

<gadget id="calculator">3_000 - 2_400</gadget>
<output>600</output>

<gadget id="calculator">600 / 2_400</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>