There is a bottle of beverage. Xiaofang drank this bottle of beverage for the first time (3/9), and drank this bottle of beverage for the second time (2/9). What percentage of this bottle of beverage did she drink in total?
有一瓶饮料，小芳第一次喝了这瓶饮料的(3/9)，第二次喝了这瓶饮料的(2/9)，一共喝了这瓶饮料的几分之几？
<gadget id="calculator">3 / 9</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

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

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