The school subscribes to newspapers and periodicals. All the students in Class 51 have subscribed to their favorite newspapers and periodicals. Among them, (3/4) students have subscribed to "Primary School Students' Composition", and (2/3) students have subscribed to "Fun Mathematics". If you have subscribed to at least one of the newspapers, what percentage of the class are those who subscribe to both newspapers and periodicals?
学校征订报刊，五1班同学全部订了自己喜欢的报刊，其中有(3/4)的同学订了《小学生作文》，有(2/3)的同学订了《趣味数学》，如果每人至少订了其中的一种报刊，那么两种报刊都订的同学占全班的几分之几？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/3) - 1</gadget>
<output>-1/3 = around -0.333333</output>

<gadget id="calculator">(3/4) + (-1/3)</gadget>
<output>5/12 = around 0.416667</output>

<result>5/12 = around 0.416667</result>