This year, there are four classes A, B, C, and D in the third grade of a senior high school this year, and the number of each class is equal. After taking the college entrance examination, the proportion of undergraduates in the three classes A, B, and C is (4/5), ( 9/(, 10)), (7/(, 8)). However, the number of undergraduates admitted by Class D is the number of students admitted by the whole school (37/140), so how much of the undergraduate students admitted by the whole school account for the third grade of senior high school? (fill in a fraction)
今年某高级中学高三年级有甲、乙、丙、丁四个班，每班人数相等，参加高考后，甲、乙、丙三个班录取大学本科的比例顺次是(4/5)，(9/(，10))，(7/(，8))．而丁班录取大学本科是全校录取人数的(37/140)，那么全校录取大学本科学生占全高三年级的多少．(填几分之几)
<gadget id="calculator">140 / 160</gadget>
<output>7/8 = around 0.875</output>

<result>7/8 = around 0.875</result>