Xiao Ming reads a story book. He reads (3/8) of the whole book on the first day and (1/4) of the whole book on the second day. What fraction of the whole book is left unread?
小明读一本故事书，第一天读了全书的(3/8)，第二天读了全书的(1/4)，还剩全书的几分之几没有读？
<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>