At a school, there were 45 boys from Club U and 40% more boys from Club V. Some boys from Club V left and the ratio of the number of boys from Club U to the number of boys from Club V became 5 : 4. How many boys from Club V left?
| |
Club U |
Club V |
| Before |
45 |
63 |
| Change |
|
- ? |
| After |
5 u |
4 u |
Number of boys from Club V at first in percent
= 100% + 40%
= 140%
Number of boys from Club V at first
= 140% x 45
=
140100 x 45
= 63
Number of boys in Club U remains unchanged.
5 u = 45
1 u = 45 ÷ 5 = 9
Number of boys from Club V in the end
= 4 u
= 4 x 9
= 36
Number of boys from Club V who left
= 63 - 36
= 27
Answer(s): 27
