In a basketball court,
56 of the girls wore cardigans. After 112 girls who wore cardigans left the basketball court, the percentage of girls who wore cardigans decreased to 25%. How many girls in the basketball court did not wear cardigans?
| |
Wore cardigans |
Did not wear cardigans |
| Before |
5x3 =
15 u |
1x3 =
3 u |
| Change |
- 112 |
|
| After |
1x1 =
1 u |
3x1 =
3 u |
25% =
25100 =
14The number of girls who did not wear cardigans remains unchanged. LCM of 1 and 3 is 3.
Number of girls who wore cardigans and left
= 15 u - 1 u
= 14 u
14 u = 112
1 u = 112 ÷ 14 = 8
Number of girls who did not wear cardigans
= 3 u
= 3 x 8
= 24
Answer(s): 24
