After a certain math test, the school arranged for 8 teachers to review the sixth grade math test papers. Within a certain period of time, each teacher had the same number of marks, because 3 teachers asked for leave for something. In order to ensure the original daily marking volume, how much should the marking volume of each teacher be increased now?
某次数学测试后，学校安排8位教师批阅六年级数学试卷，在一定时间内每个教师的批阅量相同，由于有3位教师有事请假．为了确保原来每天的阅卷量，现在每个教师的批阅量要提高多少．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/5) - (1/8)</gadget>
<output>3/40 = around 0.075</output>

<gadget id="calculator">(3/40) / (1/8)</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>