Qinglian community planted 250 osmanthus trees this year, and 20 did not survive. What is the survival rate of these trees?
青莲社区今年种了250棵桂花树，有20棵没有成活，这批树的成活率是多少．
<gadget id="calculator">250 - 20</gadget>
<output>230</output>

<gadget id="calculator">230 / 250</gadget>
<output>23/25 = around 0.92</output>

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

<gadget id="calculator">(23/25) * 1</gadget>
<output>23/25 = around 0.92</output>

<result>23/25 = around 0.92</result>