There is a fraction whose denominator is 4 more than the numerator. If you add 9 to both the numerator and the denominator, the fraction you get will be (7/9), what is the fraction?
有一个分数，它的分母比分子多4．如果把分子、分母都加上9，得到的分数约分后是(7/9)，这个分数是多少．
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<result>5/9 = around 0.555556</result>