At a school, there were 40 pupils from Club L and 25% more pupils from Club M. Some pupils from Club M left and the ratio of the number of pupils from Club L to the number of pupils from Club M became 5 : 3. How many pupils from Club M left?
| |
Club L |
Club M |
| Before |
40 |
50 |
| Change |
|
- ? |
| After |
5 u |
3 u |
Number of pupils from Club M at first in percent
= 100% + 25%
= 125%
Number of pupils from Club M at first
= 125% x 40
=
125100 x 40
= 50
Number of pupils in Club L remains unchanged.
5 u = 40
1 u = 40 ÷ 5 = 8
Number of pupils from Club M in the end
= 3 u
= 3 x 8
= 24
Number of pupils from Club M who left
= 50 - 24
= 26
Answer(s): 26
