The fifth-grade students planted trees, and 73 trees survived, and 8 trees did not survive. The number of trees that survived accounted for ((())/(())) of the total number of trees planted.
五年级同学栽树，活了73棵，有8棵没有成活，活的棵数占栽树总数的((())/(()))．
<gadget id="calculator">73 + 8</gadget>
<output>81</output>

<gadget id="calculator">8 / 81</gadget>
<output>8/81 = around 0.098765</output>

<result>8/81 = around 0.098765</result>