The content of a glass of fruit juice is 20% apple juice (the content of each part of the glass is the same), what is the content of the apple juice after drinking half of it
一杯果子汁苹果汁的含量为20%(杯中各部分含量相同)，喝去一半后，苹果汁的含量为多少
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>