The school sells and transports a batch of fruits, apples account for (1/4), oranges account for (1/5), and the rest are bananas. What percentage of this batch of fruit are bananas?
学校售运进一批水果，苹果占(1/4)，橘子占(1/5)，其余是香蕉．香蕉占这批水果的几分之几？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">1 - (1/4) - (1/5)</gadget>
<output>11/20 = around 0.55</output>

<result>11/20 = around 0.55</result>