There are 400 peach trees in the orchard, which is 100 fewer than pear trees. How much less are peach trees than pear trees?
果园里有桃树400棵，比梨树少100棵．桃树比梨树少百分之几？
<gadget id="calculator">400 + 100</gadget>
<output>500</output>

<gadget id="calculator">100 / 500</gadget>
<output>1/5 = around 0.2</output>

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