At a school, there were 25 students from Club U and 40% less students from Club V. Some students joined Club V and the ratio of the number of students from Club U to the number of students from Club V became 5 : 4. How many students joined Club V?
| |
Club U |
Club V |
| Before |
25 |
15 |
| Change |
|
+ ? |
| After |
5 u |
4 u |
Number of students from Club V at first in percent
= 100% - 40%
= 60%
Number of students from Club V at first
= 60% x 25
=
60100 x 25
= 15
Number of students in Club U remains unchanged.
5 u = 25
1 u = 25 ÷ 5 = 5
Number of students from Club V in the end
= 4 u
= 4 x 5
= 20
Number of students joined Club V
= 20 - 15
= 5
Answer(s): 5
