The scientific and technological team uses 400 seeds to do a germination test, and 20 seeds do not germinate. Find the germination rate of this batch of seeds.
科技小组用400粒种子做发芽试验，有20粒没有发芽，求这批种子的发芽率．
<gadget id="calculator">400 - 20</gadget>
<output>380</output>

<gadget id="calculator">380 / 400</gadget>
<output>19/20 = around 0.95</output>

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

<gadget id="calculator">(19/20) * 1</gadget>
<output>19/20 = around 0.95</output>

<result>19/20 = around 0.95</result>