There are 100 students in the fifth grade, including 20 students who are short-sighted. What is the myopia rate of fifth grade students?
五年级共100人，其中近视人数20人．五年级学生的近视率是多少．
<gadget id="calculator">20 / 100</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>