Xiaodan reads a story book, read the whole book in the morning (2/9), and read the whole book more in the afternoon than in the morning (1/9). What percentage of the book did you read in total on this day?
小丹看一本故事书，上午看了全书的(2/9)，下午比上午多看了全书的(1/9)．这一天共看了全书的几分之几？
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">(2/9) + (1/9)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(2/9) + (1/3)</gadget>
<output>5/9 = around 0.555556</output>

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