A batch of corn seeds, the ratio of the number of germinated kernels to the number of ungerminated kernels is 3:1, what is the germination rate of this batch of seeds
一批玉米种子，发芽粒数与没有发芽粒数的比是3：1，这批种子的发芽率是多少
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

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

<gadget id="calculator">(3/4) * 1</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>