If 800 trees are planted, 40 of them do not survive. What is the survival rate?
栽800棵树，有40棵没有成活，成活率为多少．
<gadget id="calculator">800 - 40</gadget>
<output>760</output>

<gadget id="calculator">760 / 800</gadget>
<output>19/20 = around 0.95</output>

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

<gadget id="calculator">(19/20) * 1</gadget>
<output>19/20 = around 0.95</output>

<result>19/20 = around 0.95</result>