Xiaohong said: "There are two relatively prime composite numbers, and their least common multiple is 72." Guess, the simplest true fraction composed of these two numbers. How many.
小红说："有两个互质的合数，它们的最小公倍数是72．"猜一猜，这两数组成的最简真分数．多少．
<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<result>8/9 = around 0.888889</result>