400 trees were seeded in the orchard this year, and 398 survived. What is the survival rate of these fruit trees?
果园今年种子了400棵树，活了398棵，这批果树的成活率是多少．
<gadget id="calculator">398 / 400</gadget>
<output>199/200 = around 0.995</output>

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

<gadget id="calculator">(199/200) * 1</gadget>
<output>199/200 = around 0.995</output>

<result>199/200 = around 0.995</result>