At a school, there were 12 students from Club P and 25% more students from Club Q. Some students from Club Q left and the ratio of the number of students from Club P to the number of students from Club Q became 4 : 3. How many students from Club Q left?
| |
Club P |
Club Q |
| Before |
12 |
15 |
| Change |
|
- ? |
| After |
4 u |
3 u |
Number of students from Club Q at first in percent
= 100% + 25%
= 125%
Number of students from Club Q at first
= 125% x 12
=
125100 x 12
= 15
Number of students in Club P remains unchanged.
4 u = 12
1 u = 12 ÷ 4 = 3
Number of students from Club Q in the end
= 3 u
= 3 x 3
= 9
Number of students from Club Q who left
= 15 - 9
= 6
Answer(s): 6
