In class 602 yesterday, 1 person asked for leave due to something, and 2 people were sick and did not attend school. There were 57 people who attended school. Find yesterday's attendance rate.
602班昨天1人有事请假、2人生病没有到校上课，到校上课的有57人．求昨天的出席率．
<gadget id="calculator">57 + 1 + 2</gadget>
<output>60</output>

<gadget id="calculator">57 / 60</gadget>
<output>19/20 = around 0.95</output>

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

<gadget id="calculator">(19/20) * 1</gadget>
<output>19/20 = around 0.95</output>

<result>19/20 = around 0.95</result>