Xiao Ming read the whole book on the first day (2/15), and the whole book on the second day (1/12), what percentage of the book is left?
一本书小明第一天看了全书的(2/15)，第二天看了全书的(1/12)，还剩全书的几分之几没有看？
<gadget id="calculator">2 / 15</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 - (2/15) - (1/12)</gadget>
<output>47/60 = around 0.783333</output>

<result>47/60 = around 0.783333</result>