If there are 25% more apple trees than pear trees, how many fewer pear trees are there than apple trees
如果苹果树的棵数比梨树多25%，那么梨树的棵数比苹果树少多少
<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>