Class 4 and Class 1 borrowed 39 short ropes from the school sports group, the first group borrowed 8, the second group borrowed 10, the third group borrowed 11, and the rest was borrowed by the fourth group. What fraction of this batch of short ropes did the fourth group borrow?
四1班的同学到学校体育组借短绳39条，第一小组借了8条，第二小组借了10条，第三小组借了11条，剩下是第四小组借的．第四小组借了这批短绳的几分之几？
<gadget id="calculator">39 - 8 - 10 - 11</gadget>
<output>10</output>

<gadget id="calculator">10 / 39</gadget>
<output>10/39 = around 0.25641</output>

<result>10/39 = around 0.25641</result>