During the Arbor Day, the students participated in tree planting activities, and 198 trees were planted, and 2 trees did not survive. What is the survival rate?
植树节时，同学们参加植树活动，种活了198棵，没成活的有2棵，成活率是多少．
<gadget id="calculator">198 + 2</gadget>
<output>200</output>

<gadget id="calculator">198 / 200</gadget>
<output>99/100 = around 0.99</output>

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

<gadget id="calculator">(99/100) * 1</gadget>
<output>99/100 = around 0.99</output>

<result>99/100 = around 0.99</result>