There are 47 students in Xiaohong's class, and two students failed in the physical education standard test. What is the possibility of Xiaohong failing?
小红所在的班级有47名同学，在体育达标测试中有两名同学不及格，小红不及格的可能性是多少．
<gadget id="calculator">2 / 47</gadget>
<output>2/47 = around 0.042553</output>

<result>2/47 = around 0.042553</result>