In a basketball court,
67 of the students wore scarves. After 45 students who wore scarves left the basketball court, the percentage of students who wore scarves decreased to 60%. How many students in the basketball court did not wear scarves?
| |
Wore scarves |
Did not wear scarves |
| Before |
6x2 =
12 u |
1x2 =
2 u |
| Change |
- 45 |
|
| After |
3x1 =
3 u |
2x1 =
2 u |
60% =
60100 =
35The number of students who did not wear scarves remains unchanged. LCM of 1 and 2 is 2.
Number of students who wore scarves and left
= 12 u - 3 u
= 9 u
9 u = 45
1 u = 45 ÷ 9 = 5
Number of students who did not wear scarves
= 2 u
= 2 x 5
= 10
Answer(s): 10
