In a basketball court,
89 of the children wore scarves. After 138 children who wore scarves left the basketball court, the percentage of children who wore scarves decreased to 25%. How many children in the basketball court did not wear scarves?
| |
Wore scarves |
Did not wear scarves |
| Before |
8x3 =
24 u |
1x3 =
3 u |
| Change |
- 138 |
|
| After |
1x1 =
1 u |
3x1 =
3 u |
25% =
25100 =
14The number of children who did not wear scarves remains unchanged. LCM of 1 and 3 is 3.
Number of children who wore scarves and left
= 24 u - 1 u
= 23 u
23 u = 138
1 u = 138 ÷ 23 = 6
Number of children who did not wear scarves
= 3 u
= 3 x 6
= 18
Answer(s): 18
