For a fraction, if 11 is added to the numerator and denominator at the same time, it will be divided into (8/9). What is the original fraction?
一个分数，如果分子分母同时加上11以后，约分后得(8/9)，原来这个分数是多少．
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<result>5/7 = around 0.714286</result>