Xiaohong reads an 80-page story book and has already read 50 pages. What percentage of the book has she read?
小红看一本80页的故事书，已经看了50页，她看了这本书的百分之几？
<gadget id="calculator">50 / 80</gadget>
<output>5/8 = around 0.625</output>

<result>5/8 = around 0.625</result>