A story book, Xiaoying read the whole book (5/12) on the first day, and (1/4) the whole book on the second day, what percentage of the book is left unread?
一本故事书，小英第一天看了全书的(5/12)，第二天看了全书的(1/4)，还剩下这本书的几分之几没有看？
<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

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

<gadget id="calculator">1 - (5/12) - (1/4)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>