In a basketball court,
49 of the children wore cardigans. After 42 children who wore cardigans left the basketball court, the percentage of children who wore cardigans decreased to 25%. How many children in the basketball court did not wear cardigans?
| |
Wore cardigans |
Did not wear cardigans |
| Before |
4x3 =
12 u |
5x3 =
15 u |
| Change |
- 42 |
|
| After |
1x5 =
5 u |
3x5 =
15 u |
25% =
25100 =
14The number of children who did not wear cardigans remains unchanged. LCM of 5 and 3 is 15.
Number of children who wore cardigans and left
= 12 u - 5 u
= 7 u
7 u = 42
1 u = 42 ÷ 7 = 6
Number of children who did not wear cardigans
= 15 u
= 15 x 6
= 90
Answer(s): 90
