A story book has 100 pages in total. Xiaohong reads the whole book (2/5) on the first day, and reads 20 pages on the second day. What percentage of the whole book has she read in two days?
一本故事书共100页，小红第一天看了全书的(2/5)，第二天看了20页，两天一共看了全书的几分之几？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(1/5) + (2/5)</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>