Huangzhuang Village planted 800 trees last year, 25% more than this year, and how many percent is this year less than last year?
黄庄村去年植树800棵，比今年多25%，今年比去年减少百分之几？
<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">800 / (5/4)</gadget>
<output>640</output>

<gadget id="calculator">800 - 640</gadget>
<output>160</output>

<gadget id="calculator">160 / 800</gadget>
<output>1/5 = around 0.2</output>

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