For a fraction, the sum of the numerator and the denominator is 45. If the numerator is increased by 9, the fraction is equal to 1. What is the fraction?
一个分数，分子与分母的和是45，如果将分子增加9，这个分数就等于1，这个分数是多少？
<gadget id="calculator">45 - 9</gadget>
<output>36</output>

<gadget id="calculator">1 + 1</gadget>
<output>2</output>

<gadget id="calculator">36 / 2</gadget>
<output>18</output>

<gadget id="calculator">18 + 9</gadget>
<output>27</output>

<gadget id="calculator">36 / 2 / 27</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>