The two masters and apprentices worked together to make 8,000 parts. The apprentice made 3,000 parts, with a passing rate of 98%, and all the parts made by the master were qualified. Ask the master and apprentice to make the pass rate of this batch of parts.
师徒两人合做8000个零件．徒弟做了3000个零件，合格率为98%，师傅做的零件全部合格．求师徒两人合做这批零件的合格率．
<gadget id="calculator">8_000 - 3_000</gadget>
<output>5_000</output>

<gadget id="calculator">98 / 100</gadget>
<output>49/50 = around 0.98</output>

<gadget id="calculator">3_000 * (49/50)</gadget>
<output>2_940</output>

<gadget id="calculator">5_000 + 2_940</gadget>
<output>7_940</output>

<gadget id="calculator">7_940 / 8_000</gadget>
<output>397/400 = around 0.9925</output>

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

<gadget id="calculator">(397/400) * 1</gadget>
<output>397/400 = around 0.9925</output>

<result>397/400 = around 0.9925</result>