In class 5 and 6 yesterday, 1 person asked for leave for something, and 2 people were sick and did not attend school. There were 57 people who attended school. What was the attendance rate of classes 5 and 6 yesterday?
五6班昨天1人有事请假、2人生病未到校上课，到校上课的有57人．五6班昨天的出席率是多少．
<gadget id="calculator">1 + 2 + 57</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>