At a school, there were 60 children from Club P and 20% more children from Club Q. Some children from Club Q left and the ratio of the number of children from Club P to the number of children from Club Q became 5 : 2. How many children from Club Q left?
| |
Club P |
Club Q |
| Before |
60 |
72 |
| Change |
|
- ? |
| After |
5 u |
2 u |
Number of children from Club Q at first in percent
= 100% + 20%
= 120%
Number of children from Club Q at first
= 120% x 60
=
120100 x 60
= 72
Number of children in Club P remains unchanged.
5 u = 60
1 u = 60 ÷ 5 = 12
Number of children from Club Q in the end
= 2 u
= 2 x 12
= 24
Number of children from Club Q who left
= 72 - 24
= 48
Answer(s): 48
