There used to be 300 books in the library kitchen of Class 1 of the sixth grade, but 60 books were purchased this semester. How much is the increase?
六年级一班图书厨里原来有图书300本，这学期又购进60本，增加了百分之几？
<gadget id="calculator">60 / 300</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>