Eight students from a certain school participated in a mathematics competition, and their average score was 82.5, among which student A got 86 points. If classmate A only scored 74 points, then how much their average score has been reduced.
某校八名学生参加数学竞赛，他们所得的平均分数是82.5分，其中A同学得86分．如果A同学只得74分，那么他们的平均分就降低了多少分．
<gadget id="calculator">86 - 74</gadget>
<output>12</output>

<gadget id="calculator">12 / 8</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>