Answer:
1:7
Explanation:
There was originally 28 students. Since 4 of them are gone. There are 24 students.
the ratio of students to markers is now:
24:168
Now you have to simplify it by finding the lowest common denominator:
24 and 168 both share 1 so:
24/24 = 1, 168/24 = 7
1:7
Therefore, for every student on that day, there is 7 markers
7 markers per student