A story book has 100 pages in total. Li Li read the whole book (1/5) on the first day, and 25 pages on the second day. What percentage of the whole book did she read in two days?
一本故事书共100页，李丽第一天看了全书的(1/5)，第二天看了25页，两天看了全书的几分之几？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/4) + (1/5)</gadget>
<output>9/20 = around 0.45</output>

<result>9/20 = around 0.45</result>