Xiao Ming got 80 questions right and 20 questions wrong in an oral calculation competition. What is the correct rate of this oral calculation?
小明在一次口算比赛中，做对了80题，错了20题，这次口算的正确率是多少．
<gadget id="calculator">80 + 20</gadget>
<output>100</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">(4/5) * 1</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>