There were 50 students in Class 61 last semester, and 2 students were transferred this semester. How much has the number of students in this class decreased?
六1班上学期有学生50人，这学期转走2人，这个班学生人数减少了多少．
<gadget id="calculator">2 / 50</gadget>
<output>1/25 = around 0.04</output>

<result>1/25 = around 0.04</result>