Elijah School had 712 students and Peter School had 25% more students. When an equal number of students left each school, the ratio of the students in Peter School to that in Elijah School became 3 : 2. How many students were there in both schools in the end?

	Elijah School	Peter School	Difference
Before	712		178
Change	- ?	- ?
After	3 u	2 u	1 u

Since an equal number of students left each school, the difference in the number of students at first and in the end between the 2 schools remains the same.  Make the difference between the number of students in Elijah School and Peter School at first and in the end the same. 

Difference between the number of students in both schools at first
= 25% x 712
= ²⁵₁₀₀ x 712
= 178

Difference between the number of students in both schools in the end
= 3 u - 2 u
= 1 u

1 u = 178

Total number of students in both schools in the end
= 3 u + 2 u
= 5 u
= 5 x 178
= 890

Answer(s): 890