Students participating in environmental protection activities have to transport 2 tons of garbage. The fifth grade transported garbage (3/5), and the sixth grade transported garbage (1/8). The rest is left for the fourth grade to transport. What percentage of the total garbage did the fourth grade transport?
学生参加环保行动要运2吨垃圾．五年级运了垃圾的(3/5)，六年级运了垃圾的(1/8)．余下的留给四年级运，四年级运了垃圾总数的几分之几？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 - (3/5) - (1/8)</gadget>
<output>11/40 = around 0.275</output>

<result>11/40 = around 0.275</result>