During the reading activity in May this year, Li Cong finished reading a popular science book for teenagers. (1/4) of the book was read in the first ten days, and (5/8) of the book was read in the middle ten days.
今年五月读书活动，李聪读完一本少年科普书．上旬读了这本书的(1/4)，到中旬已经读了这本书的(5/8)，下旬比上旬多读了这本书的几分之几？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

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

<gadget id="calculator">1 - (5/8) - (1/4)</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>