A simple fraction, if 3 is added to the numerator, the fraction value is 1; if 1 is subtracted from the numerator, it can be reduced to (1/2). What is the simplest fraction?
一个最简分数，如果分子加上3，分数值是1；如果分子减去1，则能约成(1/2)．这个最简分数是多少？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<result>5/8 = around 0.625</result>