For a fraction, after adding 1 to the numerator, its value is (3/4); after subtracting 1 from the numerator, its value is (1/2). What is this score.
一个分数，分子加1后，其值为(3/4)；分子减1后，其值为(1/2)．这个分数是多少．
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

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