At a school, there were 60 children from Club U and 10% more children from Club V. Some children from Club V left and the ratio of the number of children from Club U to the number of children from Club V became 5 : 4. How many children from Club V left?
| |
Club U |
Club V |
| Before |
60 |
66 |
| Change |
|
- ? |
| After |
5 u |
4 u |
Number of children from Club V at first in percent
= 100% + 10%
= 110%
Number of children from Club V at first
= 110% x 60
=
110100 x 60
= 66
Number of children in Club U remains unchanged.
5 u = 60
1 u = 60 ÷ 5 = 12
Number of children from Club V in the end
= 4 u
= 4 x 12
= 48
Number of children from Club V who left
= 66 - 48
= 18
Answer(s): 18
