A book has 200 pages in total, and 50 pages have been read, what percentage of the book has been read?
一本书共200页，已经看了50页，已经看了这本书的几分之几？
<gadget id="calculator">50 / 200</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>