In a corn seed germination test, 180 seeds germinated and 20 did not germinate. What is the germination rate of these corn seeds?
做玉米种子发芽试验，有180粒种子发芽，20粒没发芽，这些玉米种子的发芽率是多少
<gadget id="calculator">180 + 20</gadget>
<output>200</output>

<gadget id="calculator">180 / 200</gadget>
<output>9/10 = around 0.9</output>

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

<gadget id="calculator">(9/10) * 1</gadget>
<output>9/10 = around 0.9</output>

<result>9/10 = around 0.9</result>