The students planted trees, and a total of 99 survived. What is the survival rate?
同学们植树，共有99棵成活，成活率是多少
<gadget id="calculator">99 / 99</gadget>
<output>1</output>

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

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

<result>1</result>