There are 8,000 books in the library, including 1,800 science and technology books. How much do science and technology books account for in all books?
图书馆共有图书8000本，其中科技图书有1800本，科技图书占全部图书的多少．
<gadget id="calculator">1_800 / 8_000</gadget>
<output>9/40 = around 0.225</output>

<result>9/40 = around 0.225</result>