A school organizes students to be vaccinated against H1N1. As a result, 396 people were vaccinated and 4 people were not vaccinated. What is the vaccination rate of this school?
某校组织学生注射H1N1疫苗，结果有396人注射了疫苗，4人没有注射，该校疫苗注射率是多少？
<gadget id="calculator">396 + 4</gadget>
<output>400</output>

<gadget id="calculator">396 / 400</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>