There are 140 students in the sixth grade in a mathematics test, and 91 of them are excellent. What is the excellent rate of this test?
六年级140名学生在一次数学检测中，其中91名学生获优秀，这次检测的优秀率是多少．
<gadget id="calculator">91 / 140</gadget>
<output>13/20 = around 0.65</output>

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

<gadget id="calculator">(13/20) * 1</gadget>
<output>13/20 = around 0.65</output>

<result>13/20 = around 0.65</result>