The school planted 200 trees, and 190 survived. What is the death rate?
学校植了200棵树，活了190棵，死亡率是多少
<gadget id="calculator">190 / 200</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>

<gadget id="calculator">1 - (19/20)</gadget>
<output>1/20 = around 0.05</output>

<result>1/20 = around 0.05</result>