Experimental Primary School No. 62 Middle School planted 80 trees for young pioneers, and 2 died. Find the survival rate of the tree planting.
实验小学六二中对少先队员植树80棵，死了2棵，求植树的成活率．
<gadget id="calculator">80 - 2</gadget>
<output>78</output>

<gadget id="calculator">78 / 80</gadget>
<output>39/40 = around 0.975</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(39/40) * 1</gadget>
<output>39/40 = around 0.975</output>

<result>39/40 = around 0.975</result>