The sum of the numerator and denominator of a simplest fraction is 50. If the fraction obtained by subtracting 5 from both the numerator and the denominator is (2/3), what is the simplest fraction?
一个最简分数的分子和分母的和是50，如果分子、分母都减去5得到的分数是(2/3)，那么这个最简分数是多少？
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">50 - 10</gadget>
<output>40</output>

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

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

<gadget id="calculator">40 * (3/5)</gadget>
<output>24</output>

<gadget id="calculator">24 + 5</gadget>
<output>29</output>

<gadget id="calculator">50 - 29</gadget>
<output>21</output>

<gadget id="calculator">21 / 29</gadget>
<output>21/29 = around 0.724138</output>

<result>21/29 = around 0.724138</result>