In an orchard, apple trees account for (4/9), peach trees account for (2/9), and the rest are hawthorn trees. What percentage of hawthorn trees account for it?
一片果园中，苹果树占(4/9)，桃树占(2/9)，其余的是山楂树，山楂树占几分之几？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">1 - (4/9) - (2/9)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>