According to statistics, the school planted 1,500 trees this year, but 30 of them did not survive. What is the survival rate of the school's tree planting this year?
据统计今年学校共植树1500棵，但有30棵没有成活．学校今年植树的成活率是多少．
<gadget id="calculator">1_500 - 30</gadget>
<output>1_470</output>

<gadget id="calculator">1_470 / 1_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>