There are 9 apples, Xiaohong eats 5, and there are still ((())/(())) of these apples.
9个苹果，小红吃了5个，还剩下这些苹果的((())/(()))．
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">1 - (5/9)</gadget>
<output>4/9 = around 0.444444</output>

<result>4/9 = around 0.444444</result>