Add 9 to the numerator and 12 to the denominator of a certain simplest fraction, and the magnitude of the fraction remains the same. What is this score.
某个最简分数的分子加上9，分母加上12，分数的大小不变．这个分数是多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

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