The ratio of number of students in schools A and B is 5 ∶ 8. If the number of students in schools A and B is increased by 20% and 15%, respectively, find the new ratio of students in schools A and B. respectively.
1
15 ∶ 23
2
15 ∶ 13
3
13 ∶ 15
4
12 ∶ 13