Sixteen students of the sixth grade in the experimental primary school failed the mathematics unit test among 64 students. According to the information provided in this test paper, what is the passing rate of this unit test?
实验小学六年级同学在这次数学单元测试中，共64人有16个同学不及格，根据这张试卷提供的信息，求这次单元测试的合格率是多少？
<gadget id="calculator">64 - 16</gadget>
<output>48</output>

<gadget id="calculator">48 / 64</gadget>
<output>3/4 = around 0.75</output>

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

<gadget id="calculator">(3/4) * 1</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>