At a school, there were 60 students from Club V and 10% more students from Club W. Some students from Club W left and the ratio of the number of students from Club V to the number of students from Club W became 5 : 3. How many students from Club W left?
| |
Club V |
Club W |
| Before |
60 |
66 |
| Change |
|
- ? |
| After |
5 u |
3 u |
Number of students from Club W at first in percent
= 100% + 10%
= 110%
Number of students from Club W at first
= 110% x 60
=
110100 x 60
= 66
Number of students in Club V remains unchanged.
5 u = 60
1 u = 60 ÷ 5 = 12
Number of students from Club W in the end
= 3 u
= 3 x 12
= 36
Number of students from Club W who left
= 66 - 36
= 30
Answer(s): 30
