After testing, a batch of parts has 15 as excellent, 25 as good, 8 as qualified, and 2 as unqualified. So what is the qualified rate of this batch of parts?
经检测，一批零件有15个为优秀，25个为良好，8个为合格，2个不合格．那么这批零件的合格率为多少
<gadget id="calculator">15 + 25 + 8 + 2</gadget>
<output>50</output>

<gadget id="calculator">50 - 2</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>