For a fraction, the sum of numerator and denominator is 67. If 4 is added to the numerator of the fraction and 9 is added to the denominator, the new fraction obtained after division is (3/5), what is the original fraction.
一个分数，分子和分母的和是67，如果分数的分子加上4，分母加上9，得到的新分数约分后是(3/5)，则原来的分数是多少．
<gadget id="calculator">30 - 4</gadget>
<output>26</output>

<gadget id="calculator">50 - 9</gadget>
<output>41</output>

<gadget id="calculator">26 / 41</gadget>
<output>26/41 = around 0.634146</output>

<result>26/41 = around 0.634146</result>