There are 36 more teachers in School D than in School E. After 20% of the teachers left School D and 50% of teachers left School E, the number of teachers who remained in School D is four times that of the number of teachers in School E. Find the number of teachers in School D at first.
|
D |
E |
Before |
5 u |
2 u |
Change |
- 1 u |
- 1 u |
After |
4 u |
1 u |
20% =
20100 =
15 50% =
50100 =
12Number of more teachers in School D than in School E
= 5 u - 2 u
= 3 u
3 u = 36
1 u = 36 ÷ 3 = 12
Number of teachers in School D at first
= 5 u
= 5 x 12
= 60
Answer(s): 60