Xiao Ming reads a 50-page story book, and reads 33 pages, what percentage of the book is left unread?
小明看一本50页的故事书，看了33页，还剩这本书的几分之几没有看？
<gadget id="calculator">50 - 33</gadget>
<output>17</output>

<gadget id="calculator">17 / 50</gadget>
<output>17/50 = around 0.34</output>

<result>17/50 = around 0.34</result>