At a school, there were 36 students from Club R and 25% less students from Club S. Some students joined Club S and the ratio of the number of students from Club R to the number of students from Club S became 6 : 5. How many students joined Club S?
| |
Club R |
Club S |
| Before |
36 |
27 |
| Change |
|
+ ? |
| After |
6 u |
5 u |
Number of students from Club S at first in percent
= 100% - 25%
= 75%
Number of students from Club S at first
= 75% x 36
=
75100 x 36
= 27
Number of students in Club R remains unchanged.
6 u = 36
1 u = 36 ÷ 6 = 6
Number of students from Club S in the end
= 5 u
= 5 x 6
= 30
Number of students joined Club S
= 30 - 27
= 3
Answer(s): 3
