In a math test, 45 of the 50 students in Class 61 got excellent. What is the excellent rate of Class 61 in this test?
在一次数学测验中，六1班50个同学有45个得了优秀，这次测验六1班的优秀率是多少．
<gadget id="calculator">45 / 50</gadget>
<output>9/10 = around 0.9</output>

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

<gadget id="calculator">(9/10) * 1</gadget>
<output>9/10 = around 0.9</output>

<result>9/10 = around 0.9</result>