At a school, there were 50 girls from Club P and 30% less girls from Club Q. Some girls joined Club Q and the ratio of the number of girls from Club P to the number of girls from Club Q became 5 : 4. How many girls joined Club Q?
| |
Club P |
Club Q |
| Before |
50 |
35 |
| Change |
|
+ ? |
| After |
5 u |
4 u |
Number of girls from Club Q at first in percent
= 100% - 30%
= 70%
Number of girls from Club Q at first
= 70% x 50
=
70100 x 50
= 35
Number of girls in Club P remains unchanged.
5 u = 50
1 u = 50 ÷ 5 = 10
Number of girls from Club Q in the end
= 4 u
= 4 x 10
= 40
Number of girls joined Club Q
= 40 - 35
= 5
Answer(s): 5
