At a school, there were 55 children from Club N and 40% less children from Club P. Some children joined Club P and the ratio of the number of children from Club N to the number of children from Club P became 5 : 4. How many children joined Club P?
|
Club N |
Club P |
Before |
55 |
33 |
Change |
|
+ ? |
After |
5 u |
4 u |
Number of children from Club P at first in percent
= 100% - 40%
= 60%
Number of children from Club P at first
= 60% x 55
=
60100 x 55
= 33
Number of children in Club N remains unchanged.
5 u = 55
1 u = 55 ÷ 5 = 11
Number of children from Club P in the end
= 4 u
= 4 x 11
= 44
Number of children joined Club P
= 44 - 33
= 11
Answer(s): 11