The students from Class 5 and 1 went to visit the old district and spent 10 hours in total. Among them, the time spent on the road accounted for (1/5), lunch and rest time accounted for (3/8), and the rest was browsing time, which accounted for What percentage?
五1班学生去老区参观，共用去10小时，其中路上用去的时间占(1/5)，吃午餐与休息时间共占(3/8)，剩下是浏览的时间，浏览的时间占几分之几？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(1/5) + (3/8)</gadget>
<output>23/40 = around 0.575</output>

<gadget id="calculator">1 - (23/40)</gadget>
<output>17/40 = around 0.425</output>

<result>17/40 = around 0.425</result>