At a school, there were 24 boys from Club K and 25% more boys from Club L. Some boys from Club L left and the ratio of the number of boys from Club K to the number of boys from Club L became 6 : 5. How many boys from Club L left?
| |
Club K |
Club L |
| Before |
24 |
30 |
| Change |
|
- ? |
| After |
6 u |
5 u |
Number of boys from Club L at first in percent
= 100% + 25%
= 125%
Number of boys from Club L at first
= 125% x 24
=
125100 x 24
= 30
Number of boys in Club K remains unchanged.
6 u = 24
1 u = 24 ÷ 6 = 4
Number of boys from Club L in the end
= 5 u
= 5 x 4
= 20
Number of boys from Club L who left
= 30 - 20
= 10
Answer(s): 10
