Xiao Ming used a batch of seeds to do a germination experiment. For the first time, 50 seeds were taken, and the germination rate was 80%. For the second time, 30 seeds were taken, and all of them germinated. What is the germination rate of this batch of seeds?
小明用一批种子做发芽实验．第一次取了50粒种子，发芽率是80%，第二次取了30粒种子，全部发芽，这批种子的发芽率是多少．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">50 * (4/5)</gadget>
<output>40</output>

<gadget id="calculator">40 + 30</gadget>
<output>70</output>

<gadget id="calculator">50 + 30</gadget>
<output>80</output>

<gadget id="calculator">70 / 80</gadget>
<output>7/8 = around 0.875</output>

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

<gadget id="calculator">(7/8) * 1</gadget>
<output>7/8 = around 0.875</output>

<result>7/8 = around 0.875</result>