Master Wang processes a batch of parts. The ratio of the number of qualified parts to the number of unqualified parts is 7:1. What is the pass rate of this batch of parts?
王师傅加工一批零件，合格的零件数与不合格的零件数的比是7：1，这批零件的合格率是多少？
<gadget id="calculator">7 + 1</gadget>
<output>8</output>

<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

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

<gadget id="calculator">(7/8) * 1</gadget>
<output>7/8 = around 0.875</output>

<result>7/8 = around 0.875</result>