A copy of "Adventure Tigers" has a total of 224 pages. Xiao Ming reads (3/5) of this book every week, and reads (1/4) of this book in the second week. How much did you miss it?
一本《冒险小虎队》共224页，小明每一个星期看了这本书的(3/5)，第二个星期看了这本书的(1/4)，还剩下这本书的几分之几没看？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (3/5) - (1/4)</gadget>
<output>3/20 = around 0.15</output>

<result>3/20 = around 0.15</result>