The sum of the numerator and the denominator is 23. After the denominator is increased by 19, a new fraction is obtained. Converting this fraction into the simplest fraction is (1/5). What fraction is the original fraction?
分子、分母之和是23，分母增加19以后，得到一个新的分数，把这个分数化为最简分数是(1/5)，原来分数是几分之几？
<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>