At a school, there were 60 students from Club H and 25% less students from Club J. Some students joined Club J and the ratio of the number of students from Club H to the number of students from Club J became 5 : 4. How many students joined Club J?
| |
Club H |
Club J |
| Before |
60 |
45 |
| Change |
|
+ ? |
| After |
5 u |
4 u |
Number of students from Club J at first in percent
= 100% - 25%
= 75%
Number of students from Club J at first
= 75% x 60
=
75100 x 60
= 45
Number of students in Club H remains unchanged.
5 u = 60
1 u = 60 ÷ 5 = 12
Number of students from Club J in the end
= 4 u
= 4 x 12
= 48
Number of students joined Club J
= 48 - 45
= 3
Answer(s): 3
