Guangming Primary School planted 500 trees on Arbor Day this year, and 490 of the trees planted survived. What is the survival rate?
光明小学今年植树节植树500棵，植的树活了490棵，成活率是多少？
<gadget id="calculator">490 / 500</gadget>
<output>49/50 = around 0.98</output>

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

<gadget id="calculator">(49/50) * 1</gadget>
<output>49/50 = around 0.98</output>

<result>49/50 = around 0.98</result>