At a school, there were 40 children from Club F and 30% more children from Club G. Some children from Club G left and the ratio of the number of children from Club F to the number of children from Club G became 4 : 3. How many children from Club G left?
| |
Club F |
Club G |
| Before |
40 |
52 |
| Change |
|
- ? |
| After |
4 u |
3 u |
Number of children from Club G at first in percent
= 100% + 30%
= 130%
Number of children from Club G at first
= 130% x 40
=
130100 x 40
= 52
Number of children in Club F remains unchanged.
4 u = 40
1 u = 40 ÷ 4 = 10
Number of children from Club G in the end
= 3 u
= 3 x 10
= 30
Number of children from Club G who left
= 52 - 30
= 22
Answer(s): 22
