On Sunday, the community organized students to carry out the "Love My Homeland" cleaning and sanitation activity. 2 students asked for leave, and 78 people actually participated. What is the attendance rate for this event?
星期天社区组织学生开展"爱我家园"清洁卫生活动，有2名同学请假，实际参加78人．这次活动的出勤率是多少？
<gadget id="calculator">78 + 2</gadget>
<output>80</output>

<gadget id="calculator">78 / 80</gadget>
<output>39/40 = around 0.975</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(39/40) * 1</gadget>
<output>39/40 = around 0.975</output>

<result>39/40 = around 0.975</result>