The sum of the numerator and denominator of a simplest fraction is 49, the new fraction obtained after adding 4 to the numerator and subtracting 4 from the denominator can be reduced to (3/4). What was the original score.
一个最简分数的分子、分母之和为49，分子加上4，分母减去4后得到的新分数可以约简为(3/4)．原来的分数是多少．
<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">49 * (3/7)</gadget>
<output>21</output>

<gadget id="calculator">21 - 4</gadget>
<output>17</output>

<gadget id="calculator">49 - 17</gadget>
<output>32</output>

<gadget id="calculator">17 / 32</gadget>
<output>17/32 = around 0.53125</output>

<result>17/32 = around 0.53125</result>