There are 251 students in the fourth grade of Lakeside Primary School. For some reason, 1 student did not participate in the mid-term test, and 4 students failed in the result. Find the passing rate.
湖滨小学四年级共有学生251人，因故期中测试时有1人没有参加，结果不及格的有4人，求及格率．
<gadget id="calculator">251 - 1 - 4</gadget>
<output>246</output>

<gadget id="calculator">251 - 1</gadget>
<output>250</output>

<gadget id="calculator">246 / 250</gadget>
<output>123/125 = around 0.984</output>

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

<gadget id="calculator">(123/125) * 1</gadget>
<output>123/125 = around 0.984</output>

<result>123/125 = around 0.984</result>