For a simple fraction, if 1 is added to the numerator, the fraction is (2/3); if 1 is added to the denominator, the fraction is (1/2), what is the fraction?
一个最简分数，若分子加上1，分数值为(2/3)；若分母加上1，分数值为(1/2)，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>