If 100 seeds are used for a germination test, 13 seeds do not germinate, what is the germination rate?
用100粒种子做发芽试验，有13粒未发芽，发芽率为多少．
<gadget id="calculator">100 - 13</gadget>
<output>87</output>

<gadget id="calculator">87 / 100</gadget>
<output>87/100 = around 0.87</output>

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

<gadget id="calculator">(87/100) * 1</gadget>
<output>87/100 = around 0.87</output>

<result>87/100 = around 0.87</result>