Add 2 to the denominator of a fraction and subtract 2 from the numerator. The difference between the numerator and the denominator of the new fraction is 123. After the division, it is (8/49). What is the original fraction?
一个分数的分母加上2，分子减去2，所得的新分数的分子与分母差是123，约分后是(8/49)，原分数是多少．
<gadget id="calculator">24 + 2</gadget>
<output>26</output>

<gadget id="calculator">147 - 2</gadget>
<output>145</output>

<gadget id="calculator">26 / 145</gadget>
<output>26/145 = around 0.17931</output>

<result>26/145 = around 0.17931</result>