There are 9 more teachers in School F than in School G. After 20% of the teachers left School F and 50% of teachers left School G, the number of teachers who remained in School F is four times that of the number of teachers in School G. Find the number of teachers in School F at first.
|
F |
G |
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 F than in School G
= 5 u - 2 u
= 3 u
3 u = 9
1 u = 9 ÷ 3 = 3
Number of teachers in School F at first
= 5 u
= 5 x 3
= 15
Answer(s): 15