At a school, there were 60 children from Club Q and 30% more children from Club R. Some children from Club R left and the ratio of the number of children from Club Q to the number of children from Club R became 6 : 5. How many children from Club R left?
| |
Club Q |
Club R |
| Before |
60 |
78 |
| Change |
|
- ? |
| After |
6 u |
5 u |
Number of children from Club R at first in percent
= 100% + 30%
= 130%
Number of children from Club R at first
= 130% x 60
=
130100 x 60
= 78
Number of children in Club Q remains unchanged.
6 u = 60
1 u = 60 ÷ 6 = 10
Number of children from Club R in the end
= 5 u
= 5 x 10
= 50
Number of children from Club R who left
= 78 - 50
= 28
Answer(s): 28
