At a school, there were 40 children from Club W and 40% more children from Club X. Some children from Club X left and the ratio of the number of children from Club W to the number of children from Club X became 5 : 3. How many children from Club X left?
| |
Club W |
Club X |
| Before |
40 |
56 |
| Change |
|
- ? |
| After |
5 u |
3 u |
Number of children from Club X at first in percent
= 100% + 40%
= 140%
Number of children from Club X at first
= 140% x 40
=
140100 x 40
= 56
Number of children in Club W remains unchanged.
5 u = 40
1 u = 40 ÷ 5 = 8
Number of children from Club X in the end
= 3 u
= 3 x 8
= 24
Number of children from Club X who left
= 56 - 24
= 32
Answer(s): 32
