A cart of fruit arrives from the supermarket, apples account for 4/15 of the total, bananas account for 2/5 of the total, and the rest are oranges. What fraction of this cart of fruits does oranges account for?
超市运来一车水果，苹果占总数的(4/15)，香蕉占总数的(2/5)，其它的是桔子，桔子占这车水果的几分之几？
<gadget id="calculator">4 / 15</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (4/15) - (2/5)</gadget>
<output>1/3 = around 0.333333</output>

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