Xiaohong reads a 105-page "Scientific Exploration", and has already read 65 pages. What fraction of the remaining pages are in the whole book?
小红看一本105页的《科学探索》，已经看了65页，剩下的页数是全书的几分之几？
<gadget id="calculator">105 - 65</gadget>
<output>40</output>

<gadget id="calculator">40 / 105</gadget>
<output>8/21 = around 0.380952</output>

<result>8/21 = around 0.380952</result>