The sixth grade art interest group has 20 people in attendance on a certain day, 1 person on sick leave, and 4 people on personal leave. What is the attendance rate on that day?
六年级美术兴趣小组某天出勤20人，病假1人，事假4人，这天的出勤率是多少．
<gadget id="calculator">20 + 4 + 1</gadget>
<output>25</output>

<gadget id="calculator">20 / 25</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">(4/5) * 1</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>