At a school, there were 60 girls from Club L and 40% less girls from Club M. Some girls joined Club M and the ratio of the number of girls from Club L to the number of girls from Club M became 5 : 4. How many girls joined Club M?
| |
Club L |
Club M |
| Before |
60 |
36 |
| Change |
|
+ ? |
| After |
5 u |
4 u |
Number of girls from Club M at first in percent
= 100% - 40%
= 60%
Number of girls from Club M at first
= 60% x 60
=
60100 x 60
= 36
Number of girls in Club L remains unchanged.
5 u = 60
1 u = 60 ÷ 5 = 12
Number of girls from Club M in the end
= 4 u
= 4 x 12
= 48
Number of girls joined Club M
= 48 - 36
= 12
Answer(s): 12
