batch of apples sold (2/5) of the total on the first day and (1/4) of the total on the second day. What fraction of the total were sold in the two days?
一批苹果，第一天卖出了总数的(2/5)，第二天卖出总数的(1/4)，两天一共卖出总数的几分之几？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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

<gadget id="calculator">(2/5) + (1/4)</gadget>
<output>13/20 = around 0.65</output>

<result>13/20 = around 0.65</result>