The sum of the numerator and denominator of a fraction is 60, which is (5/7) after division. What is the fraction?
一个分数的分子、分母之和为60，约分后为(5/7)，这个分数是多少．
<gadget id="calculator">5 + 7</gadget>
<output>12</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">60 * (7/12)</gadget>
<output>35</output>

<gadget id="calculator">(5/12) / 35</gadget>
<output>1/84 = around 0.011905</output>

<gadget id="calculator">60 * (1/84)</gadget>
<output>5/7 = around 0.714286</output>

<result>5/7 = around 0.714286</result>