In a basketball court,
25 of the students wore cardigans. After 40 students who wore cardigans entered the basketball court, the percentage of students who wore cardigans increased to 60%. How many students in the basketball court did not wear cardigans?
| |
Wore cardigans |
Did not wear cardigans |
| Before |
2x2 =
4 u |
3x2 =
6 u |
| Change |
+ 40 |
|
| After |
3x3 =
9 u |
2x3 =
6 u |
60% =
60100 =
35The number of students who did not wear cardigans remains unchanged. LCM of 3 and 2 is 6.
Number of students who wore cardigans and left
= 9 u - 4 u
= 5 u
5 u = 40
1 u = 40 ÷ 5 = 8
Number of students who did not wear cardigans
= 6 u
= 6 x 8
= 48
Answer(s): 48
