There is a fraction. Adding 1 to the numerator equals (3/5), and subtracting 1 from the numerator equals (5/9). What is the fraction?
有一个分数，分子加1等于(3/5)，分子减1等于(5/9)，这个分数是多少．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">(3/5) + (5/9)</gadget>
<output>52/45 = around 1.155556</output>

<gadget id="calculator">(52/45) / 2</gadget>
<output>26/45 = around 0.577778</output>

<result>26/45 = around 0.577778</result>