The school organizes the sixth grade students to go to the zoo. There are 156 students in attendance, 3 on sick leave, and 1 on personal leave. What is the attendance rate of the students this time?
学校组织六年级学生到动物园游玩，出勤的学生有156人，病假3人，事假1人，这次学生游玩的出勤率是多少．
<gadget id="calculator">156 + 3 + 1</gadget>
<output>160</output>

<gadget id="calculator">156 / 160</gadget>
<output>39/40 = around 0.975</output>

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