There are 50 students in a class, and the passing rate of a math test is 98%, so how many people fail?
某班有50位学生，一次数学测试的合格率是98%，那么不合格的人数为多少．
<gadget id="calculator">98 / 100</gadget>
<output>49/50 = around 0.98</output>

<gadget id="calculator">1 - (49/50)</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">50 * (1/50)</gadget>
<output>1</output>

<result>1</result>