He obviously did 50 calculation questions, and he thought his correct rate was 98% in the first check, but after a second check, he found another wrong question. What should be the obvious correct rate.
明明做了50道口算题，初次检查他认为自己的正确率为98%，但是再次检查后又发现了一道错题．明明的正确率应该是多少．
<gadget id="calculator">98 / 100</gadget>
<output>49/50 = around 0.98</output>

<gadget id="calculator">50 * (49/50)</gadget>
<output>49</output>

<gadget id="calculator">49 - 1</gadget>
<output>48</output>

<gadget id="calculator">48 / 50</gadget>
<output>24/25 = around 0.96</output>

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

<gadget id="calculator">(24/25) * 1</gadget>
<output>24/25 = around 0.96</output>

<result>24/25 = around 0.96</result>