There is a group of the simplest true fractions, the product of the numerator and the denominator of each fraction is 60, if all such fractions are arranged in descending order, what is the second number?
有一组最简真分数，每个分数的分子与分母的乘积都是60，如果把所有这样的分数从大到小排列，第二个数是多少．
<gadget id="calculator">4 / 15</gadget>
<output>4/15 = around 0.266667</output>

<result>4/15 = around 0.266667</result>