The library bought a new batch of books, borrowed this batch of books on the first day (1/3), and borrowed this batch of books on the second day less than the first day (1/12). What fraction of the batch of books?
图书馆新买来一批书，第一天借了这批书的(1/3)，第二天比第一天少借出这批书的(1/12)，两天共借出这批书的几分之几？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">(1/3) - (1/12)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/3) + (1/4)</gadget>
<output>7/12 = around 0.583333</output>

<result>7/12 = around 0.583333</result>