A story book, Xiaohong read the whole book (3/8) on the first day, read the whole book (1/4) on the second day, just finished this book on the third day, and read this book on the third day What fraction of the book?
一本故事书，小红第一天看了全书的(3/8)，第二天看了全书的(1/4)，第三天把这本书刚好看完，第三天看了这本书的几分之几？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

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

<gadget id="calculator">1 - (3/8) - (1/4)</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>