The sum of the numerator and denominator of a fraction is 23, and the denominator is increased by 19 to get a new fraction, which is (1/5) after simplification, find the original fraction.
一个分数的分子与分母的和是23，分母增加19后得到一个新分数，化简后是(1/5)，求原来的分数．
<gadget id="calculator">23 + 19</gadget>
<output>42</output>

<gadget id="calculator">1 + 5</gadget>
<output>6</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">42 * (1/6)</gadget>
<output>7</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">42 * (5/6)</gadget>
<output>35</output>

<gadget id="calculator">35 - 19</gadget>
<output>16</output>

<gadget id="calculator">7 / 16</gadget>
<output>7/16 = around 0.4375</output>

<result>7/16 = around 0.4375</result>