A primary school did a seed germination experiment. 40 seeds germinated and 10 seeds did not germinate. What is the germination rate of these seeds?
某小学做种子发芽实验，有40粒种子发芽，有10粒种子没有发芽，这些种子的发芽率是多少
<gadget id="calculator">40 + 10</gadget>
<output>50</output>

<gadget id="calculator">40 / 50</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>