In a basketball court,
38 of the children wore vests. After 40 children who wore vests left the basketball court, the percentage of children who wore vests decreased to 25%. How many children in the basketball court did not wear vests?
| |
Wore vests |
Did not wear vests |
| Before |
3x3 =
9 u |
5x3 =
15 u |
| Change |
- 40 |
|
| After |
1x5 =
5 u |
3x5 =
15 u |
25% =
25100 =
14The number of children who did not wear vests remains unchanged. LCM of 5 and 3 is 15.
Number of children who wore vests and left
= 9 u - 5 u
= 4 u
4 u = 40
1 u = 40 ÷ 4 = 10
Number of children who did not wear vests
= 15 u
= 15 x 10
= 150
Answer(s): 150
