batch of seeds is used for a germination test. As a result, 80 seeds germinate and 20 do not germinate. What is the germination rate of this batch of seeds?
用一批种子做发芽试验，结果80粒发芽，20粒未发芽，这批种子发芽率是多少．
<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>