In the fifth unit test of mathematics, 42 of the 50 students in the class passed. What is the passing rate?
数学第五单元测试中，全班50名同学有42人及格，及格率是多少？
<gadget id="calculator">42 / 50</gadget>
<output>21/25 = around 0.84</output>

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

<gadget id="calculator">(21/25) * 1</gadget>
<output>21/25 = around 0.84</output>

<result>21/25 = around 0.84</result>