For a fraction, the sum of the numerator and denominator is 48. If 1 is added to both the numerator and the denominator, the resulting fraction will be (2/3) after division. What is the original fraction?
一个分数，分子分母的和是48，如果分子分母都加上1，所得分数约分后是(2/3)，原来的分数是多少．
<gadget id="calculator">48 + 1 + 1</gadget>
<output>50</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">50 * (2/5)</gadget>
<output>20</output>

<gadget id="calculator">20 - 1</gadget>
<output>19</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">50 * (3/5)</gadget>
<output>30</output>

<gadget id="calculator">30 - 1</gadget>
<output>29</output>

<gadget id="calculator">19 / 29</gadget>
<output>19/29 = around 0.655172</output>

<result>19/29 = around 0.655172</result>