Xiaoqiang reads a book of fairy tales. He reads the whole book (2/9) on the first day, and (3/8) the whole book on the second day. What fraction of the whole book is left?
小强看一本童话故事书，第一天看了全书的(2/9)，第二天看了全书的(3/8)，还剩下全书的几分之几？
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (2/9) - (3/8)</gadget>
<output>29/72 = around 0.402778</output>

<result>29/72 = around 0.402778</result>