The students in Class 51 spontaneously organized three environmental protection groups. Among them, the students who participated in the garbage cleaning group and the waste recycling group accounted for the whole class (3/4), and the students who participated in the waste recycling group and the waste classification accounted for the whole class (5/6). What percentage of the class are your classmates?
五1班的同学自发组织了三个环保小组．其中参加垃圾清理小组和参加废品回收小组的同学的占全班人数的(3/4)，参加废品回收小组和参加废品归类的同学占全班人数的(5/6)，参加废品回收小组的同学占全班人数的几分之几？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

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

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(5/6) - (1/4)</gadget>
<output>7/12 = around 0.583333</output>

<result>7/12 = around 0.583333</result>