For a minimal fraction, if you add 1 to the numerator, the value of the fraction is equal to 1, and if you add 1 to the denominator, the value of the fraction is equal to (2/3), what is the simplest fraction?
一个最简分数，如果给分子加1，分数值就等于1，如果给分母加1，分数值等于(2/3)，这个最简分数是多少．
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>