The school bought a batch of homework books and distributed them in the morning (3/8) and in the afternoon (4/8). Are these homework books distributed? If not, how much is left?
学校买进一批作业本发奖，上午发出了(3/8)，下午发出了(4/8)，这批作业本发完了吗？若没有，还剩几分之几？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">4 / 8</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(3/8) + (1/2)</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">1 - (7/8)</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>