There is a simplest fraction, its denominator can be reduced to (4/5) by adding 1, and it can be reduced to (2/3) by adding 3 to the denominator. What is this fraction?
有一个最简分数，它的分母加1可约成(4/5)，分母加3，可约成(2/3)，这个分数是多少．
<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<result>8/9 = around 0.888889</result>