The ratio of the number of people who arrived at school to the number of people who did not arrive at school today is 4:1. What is the attendance rate today?
今天到校人数与未到校人数比是4：1，今天的出勤率是多少
<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<gadget id="calculator">4 / 5</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>