In the vision test of the students in Class 1, 40 students were not myopic, and 10 students were myopic. What is the rate of myopia in Class 1?
六1班学生视力测验，有40名学生不近视，有10名学生测出近视，六1班的近视率为多少
<gadget id="calculator">40 + 10</gadget>
<output>50</output>

<gadget id="calculator">10 / 50</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">(1/5) * 1</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>