There are 18 more teachers in School H than in School J. After 20% of the teachers left School H and 50% of teachers left School J, the number of teachers who remained in School H is four times that of the number of teachers in School J. Find the number of teachers in School H at first.
|
H |
J |
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 H than in School J
= 5 u - 2 u
= 3 u
3 u = 18
1 u = 18 ÷ 3 = 6
Number of teachers in School H at first
= 5 u
= 5 x 6
= 30
Answer(s): 30