For a fraction, the sum of the numerator and denominator is 55. If both the numerator and denominator are increased by 5, the new fraction obtained is (1/4) after simplification. What is the original fraction?
一个分数，分子与分母的和是55，若分子分母都增加5，所得的新分数化简后是(1/4)，原来分数是多少．
<gadget id="calculator">55 + 5 + 5</gadget>
<output>65</output>

<gadget id="calculator">1 + 4</gadget>
<output>5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">65 * (1/5)</gadget>
<output>13</output>

<gadget id="calculator">13 - 5</gadget>
<output>8</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">65 * (4/5)</gadget>
<output>52</output>

<gadget id="calculator">52 - 5</gadget>
<output>47</output>

<gadget id="calculator">8 / 47</gadget>
<output>8/47 = around 0.170213</output>

<result>8/47 = around 0.170213</result>