At a school, there were 40 children from Club T and 40% more children from Club U. Some children from Club U left and the ratio of the number of children from Club T to the number of children from Club U became 5 : 4. How many children from Club U left?
| |
Club T |
Club U |
| Before |
40 |
56 |
| Change |
|
- ? |
| After |
5 u |
4 u |
Number of children from Club U at first in percent
= 100% + 40%
= 140%
Number of children from Club U at first
= 140% x 40
=
140100 x 40
= 56
Number of children in Club T remains unchanged.
5 u = 40
1 u = 40 ÷ 5 = 8
Number of children from Club U in the end
= 4 u
= 4 x 8
= 32
Number of children from Club U who left
= 56 - 32
= 24
Answer(s): 24
