In a basketball court,
45 of the children wore caps. After 105 children who wore caps left the basketball court, the percentage of children who wore caps decreased to 10%. How many children in the basketball court did not wear caps?
|
Wore caps |
Did not wear caps |
Before |
4x9 = 36 u |
1x9 = 9 u |
Change |
- 105 |
|
After |
1x1 = 1 u |
9x1 = 9 u |
10% =
10100 =
110The number of children who did not wear caps remains unchanged. LCM of 1 and 9 is 9.
Number of children who wore caps and left
= 36 u - 1 u
= 35 u
35 u = 105
1 u = 105 ÷ 35 = 3
Number of children who did not wear caps
= 9 u
= 9 x 3
= 27
Answer(s): 27