A fraction is reduced twice with 3 and once with 5, and finally the simplest fraction (3/4) is obtained. What is the original fraction?
一个分数，用3约了两次，用5约了一次，最后得到最简分数(3/4)，则这个分数原来是多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>