The denominator of a fraction is 6, and the numerator is 2 less than the denominator, what is the fraction
一个分数的分母是6，分子比分母小2，这个分数是多少
<gadget id="calculator">6 - 2</gadget>
<output>4</output>

<gadget id="calculator">4 / 6</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>