Grade 5 students from Jiazhou Foreign School visited the Chengdu Science and Technology Museum and spent 8 hours there. Among them, the time spent traveling back and forth by car accounts for (1/2), the time for lunch and rest accounts for (1/8), and the rest is for visiting time. What percentage of the visit time?
嘉州外校五年级同学到成都科技馆参观，共用去8小时．其中，来回乘车用去的时间占(1/2)，吃午饭和休息时间占(1/8)，剩下的是参观时间．参观时间占几分之几？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">1 - (1/2) - (1/8)</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>