At a school, there were 60 pupils from Club K and 25% less pupils from Club L. Some pupils joined Club L and the ratio of the number of pupils from Club K to the number of pupils from Club L became 6 : 5. How many pupils joined Club L?
| |
Club K |
Club L |
| Before |
60 |
45 |
| Change |
|
+ ? |
| After |
6 u |
5 u |
Number of pupils from Club L at first in percent
= 100% - 25%
= 75%
Number of pupils from Club L at first
= 75% x 60
=
75100 x 60
= 45
Number of pupils in Club K remains unchanged.
6 u = 60
1 u = 60 ÷ 6 = 10
Number of pupils from Club L in the end
= 5 u
= 5 x 10
= 50
Number of pupils joined Club L
= 50 - 45
= 5
Answer(s): 5
