A minimal fraction, add 4 to the numerator, the fraction is 100%, if the numerator subtracts 2, it can be divided into (1/3), then what is the simplest fraction
一个最简分数，分子加上4，分数就是100%，如果分子减去2，就可以约分成(1/3)，则这个最简分数是多少
<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<result>5/9 = around 0.555556</result>